Hash Functions - Uses, Requirements, Secure Hash Algorithm
0 likes36 views
The document discusses cryptographic hash functions, focusing on their properties, uses, and security requirements. It highlights the significance of SHA-1 and its successors, including SHA-256, SHA-384, and SHA-512, emphasizing their role in message integrity, authentication, and digital signatures. Additionally, it outlines issues related to hash functions, such as collision resistance and the importance of secure hash algorithms in modern applications.
1 of 18
Download to read offline
Ad
Recommended
Cryptography-Hash-Functions.pptx
Cryptography-Hash-Functions.pptxAngeloChangcoco This document discusses cryptographic hash functions. It provides an overview of their usage, properties, structure, and attacks. Hash functions map messages of arbitrary length to fixed-length digests. They are used for applications like file integrity verification, password storage, and digital signatures. The document outlines the design of common hash functions like MD5 and SHA-1/2, and notes that MD5 is insecure while SHA-1 is becoming outdated. It discusses the need for a new secure hash standard, and the NIST SHA-3 competition to select standardized replacement functions.
Hash Function
Hash Function ssuserdfb2da This document discusses cryptographic hash functions including their applications in message authentication and digital signatures. It describes the requirements for hash functions to be secure including resistance to brute force attacks and cryptanalysis. The document outlines some simple hash functions and provides details on the Secure Hash Algorithm (SHA) family of cryptographic hash functions used in standards like SHA-512 which operates on 1024-bit blocks through 80 rounds. It also mentions NIST's selection of the Keccak algorithm as the new SHA-3 standard.
Hash_Crypto.ppt
Hash_Crypto.pptssuser5297f5 This document discusses cryptographic hash functions. It provides an overview of hash functions and their properties like producing a fixed-length digest from an arbitrary-length message. It describes common hash functions like MD5, SHA-1 and SHA-2 and their structures. It also discusses attacks on hash functions and the need for a new secure hash standard to replace insecure functions like MD5 and the weakened SHA-1, leading to the NIST SHA-3 competition to select a new standard.
01204427-Hash_Crypto (1).ppt
01204427-Hash_Crypto (1).pptGnanalakshmiV This document discusses cryptographic hash functions. It provides an overview of hash functions and their properties like producing a fixed-length digest from an arbitrary-length message. It describes common hash functions like MD5, SHA-1 and SHA-2 and their structures. It also discusses attacks on hash functions and the need for a new secure hash standard to replace insecure functions like MD5 and the soon-to-be insecure SHA-1, leading to the NIST SHA-3 competition to select a new standard.
secure hash function for authentication in CNS
secure hash function for authentication in CNSNithyasriA2 Cryptographic hash functions are used for message authentication, digital signatures, and other applications. They must be resistant to preimage, second preimage, and collision attacks. Popular hash functions include SHA-1, SHA-2 (SHA-256, SHA-384, SHA-512), and the new standard SHA-3. SHA-3 uses a sponge construction that partitions inputs into blocks processed sequentially by an iteration function f to produce an output block. This provides resistance against cryptanalysis attacks on previous hash functions.
Hash Function & Analysis
Hash Function & AnalysisPawandeep Kaur This document discusses hash functions and their analysis for a network security seminar. It begins by defining a hash function as a mathematical function that converts a large amount of data into a small string of integers. Common applications of hash functions include hash tables for quickly searching data, eliminating data redundancy, caches, bloom filters, and pattern matching. Cryptographic hash functions have properties like preimage and second preimage resistance as well as collision resistance. Popular cryptographic hash functions discussed include MD2, MD4, MD5, SHA-1, and SHA-2, along with their advantages, limitations, and examples of attacks.
Hash crypto
Hash cryptoFraboni Ec The document discusses cryptographic hash functions, including an overview of their usage, properties, structures, attacks, and the development of standards. Hash functions take an arbitrary-length message and generate a fixed-length digest. They are used for applications like file integrity verification, password storage, and digital signatures. Key properties include producing the same hash for identical messages, being preimage and second preimage resistant, and collision resistant. Common hash functions include MD5, SHA-1, SHA-2, and RIPEMD, with NIST developing new standards like SHA-3 due to attacks on older functions.
Hash crypto
Hash cryptoHarry Potter The document discusses cryptographic hash functions, including an overview of their usage, properties, structures, attacks, and the need for a new secure hash standard. It describes how hash functions work by condensing arbitrary messages into fixed-size message digests. The properties of preimage resistance, second preimage resistance, and collision resistance are explained. Common hashing algorithms like MD5, SHA-1, and SHA-2 are outlined along with vulnerabilities like birthday attacks. The document concludes by noting the need to replace standards like MD5 and SHA-1 due to successful cryptanalysis attacks.
Hash crypto
Hash cryptoLuis Goldster The document discusses cryptographic hash functions, including an overview of their usage, properties, structures, attacks, and the need for a new secure hash standard. Hash functions take an arbitrary-length message and condense it to a fixed length digest. They are used for applications like file integrity verification, password storage, and digital signatures. Key properties include producing fixed length outputs, and being preimage, second preimage, and collision resistant. Common hash functions like MD5 and SHA-1 have been broken or are becoming vulnerable to attacks. This highlights the need for a new secure hash standard with stronger security.
Hash crypto
Hash cryptoDavid Hoen This document discusses cryptographic hash functions. It provides an overview of hash functions and their properties like producing a fixed-length digest from an arbitrary-length message. Common hash functions like MD5, SHA-1, and SHA-2 are described along with attacks against them. The need for a new secure hash standard, SHA-3, is explained due to weaknesses found in earlier standards like MD5 and SHA-1. The timeline and process for the SHA-3 competition to select a new standard by 2012 is summarized.
Hash crypto
Hash cryptoTony Nguyen The document discusses cryptographic hash functions, including an overview of their usage, properties, structures, attacks, and the need for a new secure hash standard. Hash functions take an arbitrary-length message and condense it to a fixed length digest. They are used for applications like file integrity verification, password storage, and digital signatures. Key properties include producing fixed length outputs, being preimage resistant (one-way), and collision resistant. Common hash functions like MD5 and SHA-1 have been broken or shown to be vulnerable to attacks. This highlights the need for a new secure hash standard with stronger security.
Hash crypto
Hash cryptoJames Wong This document discusses cryptographic hash functions. It provides an overview of hash functions and their properties like producing a fixed-length digest from an arbitrary-length message. Common hash functions like MD5, SHA-1, and SHA-2 are described along with attacks against them. The need for a new secure hash standard, SHA-3, is explained due to weaknesses found in earlier standards like MD5 and SHA-1. The timeline and process for the SHA-3 competition to select a new standard by 2012 is summarized.
Hash crypto
Hash cryptoYoung Alista The document discusses cryptographic hash functions, including an overview of their usage, properties, structures, attacks, and the development of standards. Hash functions take an arbitrary-length message and generate a fixed-length digest. They are used for applications like file integrity verification, password storage, and digital signatures. Key properties include producing the same hash for identical messages, and being preimage and collision resistant. Common hash functions are based on the Merkle-Damgard structure and use compression functions. Attacks like birthday attacks aim to find collisions by processing many messages. Due to attacks on MD5 and concerns about SHA-1, NIST is developing a new secure hash standard called SHA-3.
Sha
Shaha123 Hash functions take a variable-length input and produce a fixed-length output. They are used to verify data integrity and ensure data has not been altered. Cryptographic hash functions have properties of being one-way and collision resistant. Secure Hash Algorithm 512 (SHA-512) is an iterative cryptographic hash function that produces a 512-bit hash value. It works by processing the input message in 1024-bit blocks through 80 rounds of compression functions using logical operations and round constants. SHA-512 and other cryptographic hash functions have applications in security protocols like TLS, PGP, and DNSSEC.
NSC_Unit-III_final.ppt
NSC_Unit-III_final.pptDrVASAVIBANDE This document discusses message authentication and the different functions that can be used for message authentication: message encryption, hash functions, and message authentication codes (MACs). It outlines the security requirements for message authentication and describes how symmetric and public-key encryption, hash functions, and MACs can provide authentication. It provides details on how MACs work and their properties. It also discusses hash functions and how they are used for message integrity checks, message authentication codes, and digital signatures.
Public Key Encryption & Hash functions
Public Key Encryption & Hash functionsDr.Florence Dayana The document discusses public key encryption and hash functions, explaining that public key encryption involves a public and a private key for secure communication, while hash functions are used to ensure data integrity. Additionally, it covers various cryptographic techniques such as message authentication codes and digital signatures, highlighting their functions and applications. The text concludes with an overview of secure hash algorithms (SHA), including SHA-2 and SHA-3, detailing their structures and security considerations.
Hashfunction
HashfunctionFraboni Ec The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing common MAC constructions.
Hashfunction
HashfunctionLuis Goldster The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing common MAC constructions.
Hashfunction
HashfunctionJames Wong The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing common MAC constructions.
Hashfunction
HashfunctionTony Nguyen The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing common MAC constructions.
Hash function
Hash functionHarry Potter The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing common MAC constructions.
Hashfunction
HashfunctionDavid Hoen The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing commonly used MAC constructions.
Hashfunction
HashfunctionYoung Alista The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing common MAC constructions.
Information and data security cryptographic hash functions
Information and data security cryptographic hash functionsMazin Alwaaly This document discusses hash functions and their cryptographic applications. It begins by defining hash functions and their properties like one-wayness and collision resistance. It then discusses various applications of cryptographic hash functions like message authentication codes, digital signatures, password files, and more. It provides details on how hash functions are used for message authentication and digital signatures. It also describes the Secure Hash Algorithm family of hash functions like SHA-1, SHA-2, and the NIST competition for the SHA-3 standard.
Secure Hashing Techniques - Introduction
Secure Hashing Techniques - IntroductionUdhayyagethan Mano The document explains secure hashing techniques, describing how hash functions transform variable-length data into fixed-length hash values that are difficult to reverse-engineer. It discusses one-way hashing, message digest functions, and specific secure hashing algorithms like SHA-0, SHA-1, and SHA-2, highlighting their characteristics and vulnerabilities. Applications of secure hashing are mentioned in contexts where sensitive data is handled, such as online banking and e-learning.
Unit 4
Unit 4KRAMANJANEYULU1 This document discusses cryptographic hash functions and their applications in message authentication and digital signatures. It begins by defining hash functions and their properties, such as producing a fixed-size output from a variable-length input. It then discusses cryptographic hash functions and their security properties like one-wayness and collision resistance. Applications like message authentication using hash functions and digital signatures by encrypting a hash with a private key are covered. Finally, it discusses requirements and analysis of hash functions.
Cns
CnsArthyR3 This document discusses message authentication and hash functions. It begins by defining message authentication and its security requirements. It then describes three approaches to message authentication: message encryption, message authentication codes (MACs), and hash functions. It provides details on how MACs and hash functions work, including properties and requirements. Specific algorithms like MD5 are also covered. The document aims to explain the concepts and tradeoffs between different message authentication techniques.
Chapter 24 Wireless Network Security Systems
Chapter 24 Wireless Network Security SystemsGoldenMIT The document discusses wireless network security, emphasizing the vulnerabilities of wireless networks compared to wired ones, including threats like eavesdropping, unauthorized access, and identity theft. It outlines security measures such as the IEEE 802.1x standard for access control, encryption techniques, and the importance of protecting mobile devices. Additionally, it details the evolution and standards of the IEEE 802.11 protocol, including security enhancements through WPA and WPA2.
Chapter 23 Internet Authentication Applications
Chapter 23 Internet Authentication ApplicationsGoldenMIT Chapter 23 of 'Computer Security: Principles and Practice' discusses Internet authentication applications, focusing on the Kerberos protocol developed at MIT for secure remote authentication via a trusted third-party service. The chapter outlines the structure of Kerberos realms, differences between Kerberos versions 4 and 5, and key concepts related to certificate authorities and public key infrastructure (PKI), including X.509 certificates and their various forms. Additionally, it covers the operational performance of Kerberos in large client-server environments and the motivations behind multiple realms in the authentication structure.
More Related Content
Similar to Hash Functions - Uses, Requirements, Secure Hash Algorithm (20)
Hash crypto
Hash cryptoHarry Potter The document discusses cryptographic hash functions, including an overview of their usage, properties, structures, attacks, and the need for a new secure hash standard. It describes how hash functions work by condensing arbitrary messages into fixed-size message digests. The properties of preimage resistance, second preimage resistance, and collision resistance are explained. Common hashing algorithms like MD5, SHA-1, and SHA-2 are outlined along with vulnerabilities like birthday attacks. The document concludes by noting the need to replace standards like MD5 and SHA-1 due to successful cryptanalysis attacks.
Hash crypto
Hash cryptoLuis Goldster The document discusses cryptographic hash functions, including an overview of their usage, properties, structures, attacks, and the need for a new secure hash standard. Hash functions take an arbitrary-length message and condense it to a fixed length digest. They are used for applications like file integrity verification, password storage, and digital signatures. Key properties include producing fixed length outputs, and being preimage, second preimage, and collision resistant. Common hash functions like MD5 and SHA-1 have been broken or are becoming vulnerable to attacks. This highlights the need for a new secure hash standard with stronger security.
Hash crypto
Hash cryptoDavid Hoen This document discusses cryptographic hash functions. It provides an overview of hash functions and their properties like producing a fixed-length digest from an arbitrary-length message. Common hash functions like MD5, SHA-1, and SHA-2 are described along with attacks against them. The need for a new secure hash standard, SHA-3, is explained due to weaknesses found in earlier standards like MD5 and SHA-1. The timeline and process for the SHA-3 competition to select a new standard by 2012 is summarized.
Hash crypto
Hash cryptoTony Nguyen The document discusses cryptographic hash functions, including an overview of their usage, properties, structures, attacks, and the need for a new secure hash standard. Hash functions take an arbitrary-length message and condense it to a fixed length digest. They are used for applications like file integrity verification, password storage, and digital signatures. Key properties include producing fixed length outputs, being preimage resistant (one-way), and collision resistant. Common hash functions like MD5 and SHA-1 have been broken or shown to be vulnerable to attacks. This highlights the need for a new secure hash standard with stronger security.
Hash crypto
Hash cryptoJames Wong This document discusses cryptographic hash functions. It provides an overview of hash functions and their properties like producing a fixed-length digest from an arbitrary-length message. Common hash functions like MD5, SHA-1, and SHA-2 are described along with attacks against them. The need for a new secure hash standard, SHA-3, is explained due to weaknesses found in earlier standards like MD5 and SHA-1. The timeline and process for the SHA-3 competition to select a new standard by 2012 is summarized.
Hash crypto
Hash cryptoYoung Alista The document discusses cryptographic hash functions, including an overview of their usage, properties, structures, attacks, and the development of standards. Hash functions take an arbitrary-length message and generate a fixed-length digest. They are used for applications like file integrity verification, password storage, and digital signatures. Key properties include producing the same hash for identical messages, and being preimage and collision resistant. Common hash functions are based on the Merkle-Damgard structure and use compression functions. Attacks like birthday attacks aim to find collisions by processing many messages. Due to attacks on MD5 and concerns about SHA-1, NIST is developing a new secure hash standard called SHA-3.
Sha
Shaha123 Hash functions take a variable-length input and produce a fixed-length output. They are used to verify data integrity and ensure data has not been altered. Cryptographic hash functions have properties of being one-way and collision resistant. Secure Hash Algorithm 512 (SHA-512) is an iterative cryptographic hash function that produces a 512-bit hash value. It works by processing the input message in 1024-bit blocks through 80 rounds of compression functions using logical operations and round constants. SHA-512 and other cryptographic hash functions have applications in security protocols like TLS, PGP, and DNSSEC.
NSC_Unit-III_final.ppt
NSC_Unit-III_final.pptDrVASAVIBANDE This document discusses message authentication and the different functions that can be used for message authentication: message encryption, hash functions, and message authentication codes (MACs). It outlines the security requirements for message authentication and describes how symmetric and public-key encryption, hash functions, and MACs can provide authentication. It provides details on how MACs work and their properties. It also discusses hash functions and how they are used for message integrity checks, message authentication codes, and digital signatures.
Public Key Encryption & Hash functions
Public Key Encryption & Hash functionsDr.Florence Dayana The document discusses public key encryption and hash functions, explaining that public key encryption involves a public and a private key for secure communication, while hash functions are used to ensure data integrity. Additionally, it covers various cryptographic techniques such as message authentication codes and digital signatures, highlighting their functions and applications. The text concludes with an overview of secure hash algorithms (SHA), including SHA-2 and SHA-3, detailing their structures and security considerations.
Hashfunction
HashfunctionFraboni Ec The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing common MAC constructions.
Hashfunction
HashfunctionLuis Goldster The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing common MAC constructions.
Hashfunction
HashfunctionJames Wong The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing common MAC constructions.
Hashfunction
HashfunctionTony Nguyen The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing common MAC constructions.
Hash function
Hash functionHarry Potter The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing common MAC constructions.
Hashfunction
HashfunctionDavid Hoen The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing commonly used MAC constructions.
Hashfunction
HashfunctionYoung Alista The document discusses hash functions and message authentication codes (MACs). It begins by defining hash functions and MACs, noting that hash functions generate a fingerprint for a message without a key while MACs use a keyed hash function. It then covers security requirements for hash functions like one-wayness and collision resistance. Popular hash functions are described like MD5, SHA-1, and the SHA-2 family. Constructions for hash functions based on block ciphers and iterated hash functions are also outlined. The document concludes by comparing hash functions and MACs and describing common MAC constructions.
Information and data security cryptographic hash functions
Information and data security cryptographic hash functionsMazin Alwaaly This document discusses hash functions and their cryptographic applications. It begins by defining hash functions and their properties like one-wayness and collision resistance. It then discusses various applications of cryptographic hash functions like message authentication codes, digital signatures, password files, and more. It provides details on how hash functions are used for message authentication and digital signatures. It also describes the Secure Hash Algorithm family of hash functions like SHA-1, SHA-2, and the NIST competition for the SHA-3 standard.
Secure Hashing Techniques - Introduction
Secure Hashing Techniques - IntroductionUdhayyagethan Mano The document explains secure hashing techniques, describing how hash functions transform variable-length data into fixed-length hash values that are difficult to reverse-engineer. It discusses one-way hashing, message digest functions, and specific secure hashing algorithms like SHA-0, SHA-1, and SHA-2, highlighting their characteristics and vulnerabilities. Applications of secure hashing are mentioned in contexts where sensitive data is handled, such as online banking and e-learning.
Unit 4
Unit 4KRAMANJANEYULU1 This document discusses cryptographic hash functions and their applications in message authentication and digital signatures. It begins by defining hash functions and their properties, such as producing a fixed-size output from a variable-length input. It then discusses cryptographic hash functions and their security properties like one-wayness and collision resistance. Applications like message authentication using hash functions and digital signatures by encrypting a hash with a private key are covered. Finally, it discusses requirements and analysis of hash functions.
Cns
CnsArthyR3 This document discusses message authentication and hash functions. It begins by defining message authentication and its security requirements. It then describes three approaches to message authentication: message encryption, message authentication codes (MACs), and hash functions. It provides details on how MACs and hash functions work, including properties and requirements. Specific algorithms like MD5 are also covered. The document aims to explain the concepts and tradeoffs between different message authentication techniques.
More from GoldenMIT (6)
Chapter 24 Wireless Network Security Systems
Chapter 24 Wireless Network Security SystemsGoldenMIT The document discusses wireless network security, emphasizing the vulnerabilities of wireless networks compared to wired ones, including threats like eavesdropping, unauthorized access, and identity theft. It outlines security measures such as the IEEE 802.1x standard for access control, encryption techniques, and the importance of protecting mobile devices. Additionally, it details the evolution and standards of the IEEE 802.11 protocol, including security enhancements through WPA and WPA2.
Chapter 23 Internet Authentication Applications
Chapter 23 Internet Authentication ApplicationsGoldenMIT Chapter 23 of 'Computer Security: Principles and Practice' discusses Internet authentication applications, focusing on the Kerberos protocol developed at MIT for secure remote authentication via a trusted third-party service. The chapter outlines the structure of Kerberos realms, differences between Kerberos versions 4 and 5, and key concepts related to certificate authorities and public key infrastructure (PKI), including X.509 certificates and their various forms. Additionally, it covers the operational performance of Kerberos in large client-server environments and the motivations behind multiple realms in the authentication structure.
Chapter 22 Internet Security Protocols and Standards
Chapter 22 Internet Security Protocols and StandardsGoldenMIT Chapter 22 discusses internet security protocols and standards, focusing on MIME and S/MIME, which enhance email security by allowing for encrypted and digitally signed messages. It also covers SSL and TLS, protocols that provide secure communication over networks, detailing their structure, operational phases, and associated security functions. Key components include protocols for session management, encryption, and important security measures like IPsec, which provides authentication and encryption for data at the network layer.
Digital Signatures RSA DSS Algorithm Explained
Digital Signatures RSA DSS Algorithm ExplainedGoldenMIT The document explains the digital signature process, which involves the sender signing a message with a private key and the receiver verifying it with the sender's public key. It details the necessity of both public and private keys, the provision of message authentication, integrity, and nonrepudiation by digital signatures, and emphasizes that confidentiality requires additional encryption. It also highlights different digital signature schemes, including the RSA and Digital Signature Standard (DSS), detailing their key generation and signing processes.
Information Security Incident Management.pdf
Information Security Incident Management.pdfGoldenMIT This document discusses information security incident management. It defines what constitutes an information security incident, such as unauthorized access or denial of service attacks. It also outlines the key aspects of an incident response program, including preparation, detection, response, and documentation. The document explains the roles of incident response coordinators, handlers, and teams. It also covers investigation practices, evidence handling, and federal and state data breach notification requirements.
ch-10.ppt
ch-10.pptGoldenMIT This document provides an overview of topics discussed in Chapter 10 on cryptosystems. It begins with an introduction to symmetric and asymmetric key cryptography, and notes they will continue to exist in parallel and complement each other. It then outlines several sections that will discuss the RSA, Rabin, ElGamal and elliptic curve cryptosystems. Example problems are provided for each system to demonstrate how keys are generated and encryption and decryption work. Potential attacks on RSA are also discussed. The document contains diagrams and equations to illustrate cryptographic concepts.
Ad
Recently uploaded (20)
INDUCTIVE EFFECT slide for first prof pharamacy students
INDUCTIVE EFFECT slide for first prof pharamacy studentsSHABNAM FAIZ The inductive effect is the electron-withdrawing or electron-donating effect transmitted through sigma (σ) bonds in a molecule due to differences in electronegativity between atoms.
---
🔹 Definition:
The inductive effect is the permanent shifting of electrons in a sigma bond caused by the electronegativity difference of atoms, resulting in partial charges within the molecule.
Code Profiling in Odoo 18 - Odoo 18 Slides
Code Profiling in Odoo 18 - Odoo 18 SlidesCeline George Profiling in Odoo identifies slow code and resource-heavy processes, ensuring better system performance. Odoo code profiling detects bottlenecks in custom modules, making it easier to improve speed and scalability.
This is why students from these 44 institutions have not received National Se...
This is why students from these 44 institutions have not received National Se...Kweku Zurek This is why students from these 44 institutions have not received National Service PIN codes (LIST)
M&A5 Q1 1 differentiate evolving early Philippine conventional and contempora...
M&A5 Q1 1 differentiate evolving early Philippine conventional and contempora...ErlizaRosete MAPEH 6 QI WEEK I
F-BLOCK ELEMENTS POWER POINT PRESENTATIONS
F-BLOCK ELEMENTS POWER POINT PRESENTATIONSmprpgcwa2024 F-block elements are a group of elements in the periodic table that have partially filled f-orbitals. They are also known as inner transition elements. F-block elements are divided into two series:
1.Lanthanides (La- Lu) These elements are also known as rare earth elements.
2.Actinides (Ac- Lr): These elements are radioactive and have complex electronic configurations.
F-block elements exhibit multiple oxidation states due to the availability of f-orbitals.
2. Many f-block compounds are colored due to f-f transitions.
3. F-block elements often exhibit paramagnetic or ferromagnetic behavior.4. Actinides are radioactive.
F-block elements are used as catalysts in various industrial processes.
Actinides are used in nuclear reactors and nuclear medicine.
F-block elements are used in lasers and phosphors due to their luminescent properties.
F-block elements have unique electronic and magnetic properties.
THE PSYCHOANALYTIC OF THE BLACK CAT BY EDGAR ALLAN POE (1).pdf
THE PSYCHOANALYTIC OF THE BLACK CAT BY EDGAR ALLAN POE (1).pdfnabilahk908 Psychoanalytic Analysis of The Black Cat by Edgar Allan Poe explores the deep psychological dimensions of the narrator’s disturbed mind through the lens of Sigmund Freud’s psychoanalytic theory. According to Freud (1923), the human psyche is structured into three components: the Id, which contains primitive and unconscious desires; the Ego, which operates on the reality principle and mediates between the Id and the external world; and the Superego, which reflects internalized moral standards.
In this story, Poe presents a narrator who experiences a psychological breakdown triggered by repressed guilt, aggression, and internal conflict. This analysis focuses not only on the gothic horror elements of the narrative but also on the narrator’s mental instability and emotional repression, demonstrating how the imbalance of these three psychic forces contributes to his downfall.
List View Components in Odoo 18 - Odoo Slides
List View Components in Odoo 18 - Odoo SlidesCeline George In Odoo, there are many types of views possible like List view, Kanban view, Calendar view, Pivot view, Search view, etc.
The major change that introduced in the Odoo 18 technical part in creating views is the tag <tree> got replaced with the <list> for creating list views.
Peer Teaching Observations During School Internship
Peer Teaching Observations During School InternshipAjayaMohanty7 FOR B.ED,M.ED,M.A.EDUCATION AND ANY STUDENT OF TEACHER EDUCATION
HistoPathology Ppt. Arshita Gupta for Diploma
HistoPathology Ppt. Arshita Gupta for Diplomaarshitagupta674 Hello everyone please suggest your views and likes so that I uploaded more study materials
In this slide full HistoPathology according to diploma course available like fixation
Tissue processing , staining etc
A Visual Introduction to the Prophet Jeremiah
A Visual Introduction to the Prophet JeremiahSteve Thomason These images will give you a visual guide to both the context and the flow of the story of the prophet Jeremiah. Feel free to use these in your study, preaching, and teaching.
June 2025 Progress Update With Board Call_In process.pptx
June 2025 Progress Update With Board Call_In process.pptxInternational Society of Service Innovation Professionals ---
June 25 ISSIP Event - slides in process
20250618 PPre-Event Presentation Summary - Progress Update with Board Series June 25
ISSIP Website Upcoming Events Description: https://issip.org/event/semi-annual-issip-progress-call/
Register here (even if you cannot attend live online, all who register will get link to recording and slides post-event): https://docs.google.com/forms/d/e/1FAIpQLSdThrop1rafOCo4PQkYiS2XApclJuMjYONEHRMGBsceRdcQqg/viewform
This pre-event presentation: https://www.slideshare.net/slideshow/june-2025-progress-update-with-board-call_in-process-pptx/280718770
This pre-event recording: https://youtu.be/Shjgd5o488o
---
University of Ghana Cracks Down on Misconduct: Over 100 Students Sanctioned
University of Ghana Cracks Down on Misconduct: Over 100 Students SanctionedKweku Zurek University of Ghana Cracks Down on Misconduct: Over 100 Students Sanctioned
LDMMIA Yoga S10 Free Workshop Grad Level
LDMMIA Yoga S10 Free Workshop Grad LevelLDM & Mia eStudios This is complete for June 17th. For the weekend of Summer Solstice
June 20th-22nd.
6/17/25: “My now Grads, You’re doing well. I applaud your efforts to continue. We all are shifting to new paradigm realities. Its rough, there’s good and bad days/weeks. However, Reiki with Yoga assistance, does work.”
6/18/25: "For those planning the Training Program Do Welcome. Happy Summer 2k25. You are not ignored and much appreciated. Our updates are ongoing and weekly since Spring. I Hope you Enjoy the Practitioner Grad Level. There's more to come. We will also be wrapping up Level One. So I can work on Levels 2 topics. Please see documents for any news updates. Also visit our websites. Every decade I release a Campus eMap. I will work on that for summer 25. We have 2 old libraries online thats open. https://ldmchapels.weebly.com "
Our Monthly Class Roster is 7,141 for 6/21.
ALL students get privacy naturally. Thx Everyone.
As a Guest Student,
You are now upgraded to Grad Level.
See Uploads for “Student Checkins” & “S9”. Thx.
Happy Summer 25.
These are also timeless.
Thank you for attending our workshops.
If you are new, do welcome.
For visual/Video style learning see our practitioner student status.
This is listed under our new training program. Updates ongoing levels 1-3 this summer. We just started Session 1 for level 1.
These are optional programs. I also would like to redo our library ebooks about Hatha and Money Yoga. THe Money Yoga was very much energy healing without the Reiki Method. An updated ebook/course will be done this year. These Projects are for *all fans, followers, teams, and Readers. TY for being presenting.
IIT KGP Quiz Week 2024 Sports Quiz (Prelims + Finals)
IIT KGP Quiz Week 2024 Sports Quiz (Prelims + Finals)IIT Kharagpur Quiz Club The document outlines the format for the Sports Quiz at Quiz Week 2024, covering various sports & games and requiring participants to Answer without external sources. It includes specific details about question types, scoring, and examples of quiz questions. The document emphasizes fair play and enjoyment of the quiz experience.
K12 Tableau User Group virtual event June 18, 2025
K12 Tableau User Group virtual event June 18, 2025dogden2 National K12 Tableau User Group: June 2025 meeting slides
VCE Literature Section A Exam Response Guide
VCE Literature Section A Exam Response Guidejpinnuck This practical guide shows students of Unit 3&4 VCE Literature how to write responses to Section A of the exam. Including a range of examples writing about different types of texts, this guide:
*Breaks down and explains what Q1 and Q2 tasks involve and expect
*Breaks down example responses for each question
*Explains and scaffolds students to write responses for each question
*Includes a comprehensive range of sentence starters and vocabulary for responding to each question
*Includes critical theory vocabulary lists to support Q2 responses
June 2025 Progress Update With Board Call_In process.pptx
June 2025 Progress Update With Board Call_In process.pptxInternational Society of Service Innovation Professionals
Ad
Hash Functions - Uses, Requirements, Secure Hash Algorithm
- 1. Cryptographic Hash Functions Each of the messages, like each one he had ever read of Stern's commands, began with a number and ended with a number or row of numbers. No efforts on the part of Mungo or any of his experts had been able to break Stern's code, nor was there any clue as to what the preliminary number and those ultimate numbers signified. —Talking to Strange Men, Ruth Rendell
- 2. Hash Functions ➢ condenses arbitrary message to fixed size h = H(M) ➢ usually assume hash function is public ➢ hash used to detect changes to message ➢ want a cryptographic hash function ⚫ computationally infeasible to find data mapping to specific hash (one-way property) ⚫ computationally infeasible to find two data to same hash (collision-free property)
- 4. Hash Function Uses ➢ Message Integrity Check (MIC) ⚫ send hash of message (digest) ⚫ MIC always encrypted, message optionally ➢ Message Authentication Code (MAC) ⚫ send keyed hash of message ⚫ MAC, message optionally encrypted ➢ Digital Signature (non-repudiation) ⚫ Encrypt hash with private (signing) key ⚫ Verify with public (verification) key
- 5. Hash Functions & Message Authentication Symmetric Key Unkeyed Hash a) Message encrypted b) Message unencrypted
- 6. Hash Functions & Message Authentication Symmetric Key Keyed Hash a) Message unencrypted d) Message encrypted
- 7. Hash Functions & Digital Signatures - PKCS
- 8. More Hash Function Uses ➢ to create a one-way password file ⚫ store hash of password not actual password ⚫ e.g., Unix, Windows NT, etc. ⚫ salt to deter precomputation attacks ⚫ Rainbow tables ➢ for intrusion detection and virus detection ⚫ keep & check hash of files on system ⚫ e.g., Tripwire
- 10. Secure Hash Algorithm ➢ SHA originally designed by NIST & NSA in 1993 ➢ was revised in 1995 as SHA-1 ➢ US standard for use with DSA signature scheme ⚫ standard is FIPS 180-1 1995, also Internet RFC3174 ⚫ nb. the algorithm is SHA, the standard is SHS ➢ based on design of MD4 with key differences ➢ produces 160-bit hash values ➢ 2005 results on security of SHA-1 raised concerns on its use in future applications
- 11. Revised Secure Hash Standard ➢ NIST issued revision FIPS 180-2 in 2002 ➢ adds 3 additional versions of SHA ⚫ SHA-256, SHA-384, SHA-512 ➢ designed for compatibility with increased security provided by the AES cipher ➢ structure & detail is similar to SHA-1 ➢ hence analysis should be similar ➢ but security levels are rather higher
- 12. SHA Versions
- 13. SHA-512 Overview
- 14. SHA-512 Processing of a Single 1024-Bit Block
- 15. SHA-512 Compression Function ➢ heart of the algorithm ➢ processing message in 1024-bit blocks ➢ consists of 80 rounds ⚫ updating a 512-bit buffer ⚫ using a 64-bit value Wt derived from the current message block ⚫ and a round constant based on cube root of first 80 prime numbers
- 18. Summary ➢ have considered: ⚫ hash functions • uses, requirements, security ⚫ SHA-512