Rijndael Algorithm for Multiple File Encryption Development

International Journal of Trend in Scientific Research and Development (IJTSRD)
Volume 6 Issue 4, May-June 2022 Available Online: www.ijtsrd.com e-ISSN: 2456 – 6470
@ IJTSRD | Unique Paper ID – IJTSRD50258 | Volume – 6 | Issue – 4 | May-June 2022 Page 1164
Rijndael Algorithm for Multiple File Encryption Development
Bryan L. Guibijar
North Eastern Mindanao State University – San Miguel Campus, Surigao del Sur, Philippines
ABSTRACT
The paper examined the Rijndael Algorithm for multiple file
encryption development of College of Information Technology
Education in North Eastern Mindanao State University – Main
Campus. It is based in waterfall model (SDLC) in which descriptive
research was applied to computer science students. Data from the
pre-assessment survey and interview were treated by using the
weighted mean to determine the level of usability of developed
multiple file encryption using Rijndael algorithm. The usability of
multiple file encryption to secure different file types from malicious
users/hackers. Thus, the developed application is important to protect
the files of the students from unauthorized use of their
projects/programs submitted.
KEYWORD: Cipher, Rijndael Algorithm, File management,
algorithm, development
How to cite this paper: Bryan L.
Guibijar "Rijndael Algorithm for
Multiple File
Encryption
Development"
Published in
International Journal
of Trend in
Scientific Research
and Development
(ijtsrd), ISSN: 2456-6470, Volume-6 |
Issue-4, June 2022, pp.1164-1168, URL:
www.ijtsrd.com/papers/ijtsrd50258.pdf
Copyright © 2022 by author(s) and
International Journal of Trend in
Scientific Research
and Development
Journal. This is an
Open Access article distributed under
the terms of the Creative Commons
Attribution License (CC BY 4.0)
(http://creativecommons.org/licenses/by/4.0)
INTRODUCTION
File security dramatically raises issue especially in
cloud computing which raises concern in
confidentiality, data availability and data integrity
(Mukhopadhyay, Sonawane, Gupta, Bhavsar, Mittal,
2013). This issues commonly happen in some
industry when the employee separated. In fact, IT
admin faces felony for deleting files under flawed
hacking law (Greenberg, 2016). These leads to
catastrophe in file management in an industry that
may cause interruption in most of the transaction and
affect the growth of the industry. The creation of
cryptograph using Rijndael algorithm as key factor to
solve the issues (Rouse, 2007). The study aims to
provide cryptograph using Rijndael algorithm to
enhance all type of file security.
Cloud computing is promising and efficient, but there
are many challenges for data privacy and security
(Singla, Singh, 2013). According to Rouse (2007),
Rijndael algorithm is a new generation symmetric
block cipher that supports key sizes of 128, 192 and
256 bits. Thereby, the encryption or decryption of a
block of data is accomplished by the iteration of a
specific transformation (Kaleigh, 2000). Although,
Rijndael Algorithm is selected by the U.S. National
Institute of Standards and technology (NIST) as
candidate for the Advanced Encryption Standard
(AES) (Daemen, Rijmen, 2013). However, several
studies revealed the weaknesses of RIJNDAEL
(Kaleigh, 2000). Where in fact, according to Hoang
and Nguyen (2012), the design uses an iterative
looping approach with block and key size of 128 bits.
Encryptions are popularly utilized to protect files
from unauthorized users and malwares. Encryption
was used to achieve authenticated communication in
computer networks (Needham, Schroeder, 1978). In
fact, cryptography is necessary when communicating
over unreliable medium (Pitchaiah, Daniel, 2012).
However, according to Townsend, (2015), the key
burned in their C# code, they are doing the encryption
but the encryption key is weak and it’s just a
password. Which revealed the even using latest
programming language will be in vain without the
help of the Rijndael Algorithm. With that, National
Institute of Standards and Technology (NIST)
adopted the Rijndael algorithm as new Advanced
Encryption Standard (AES) to replace existing Data
Encryption Standard (DES) (Adib, Raissouni, 2012).
Implementation of Rijndael algorithm to enhance all
type of file security provides resilient file
IJTSRD50258

International Journal of Trend in Scientific Research and Development @ www.ijtsrd.com eISSN: 2456-6470
management especially in cloud computing. Thereby,
Cloud Cognitive Authenticator (CCA) proposed
provided by the Advanced Encryption Standard
(AES) which is the Rijndael algorithm. Thus,
enhancing the security issues from unauthorized users
and malwares. The study increases the security for
confidentiality, data availability and data integrity. It
also creates harmonious environment between the
civilian users and hackers. In fact, hackers doing may
be avoided using the Rijndael algorithm encryption
method.
Theoretical / Conceptual Framework
Figure 1 The Schema of the Study
The schema of this study explains the development of multiple file encryption using Rijndael Algorithm. The
Multiple file encryption using Rijndael Algorithm is an application intended to encrypt different file types to
avoid file thief, file alter and file damage by a virus. As a result student file security will be strengthen.
Cyber Security Theory, according to Kuusisto (2013), that the study on the key concepts and terms of cyber
security and presents the physical world and the cyber world framework. It also refers about the society and uses
of the model to analyse the results of two limited media survey about cyber-related newspaper. It also added that
the media survey indicate strong need to organize the cyber world.
RESEARCH DESIGN AND METHODS
The study is a descriptive type of research in which survey questionnaire and interview was applied to the
students of College of Engineering, Computer Studies and Technology (CECST) to find out the level of usability
of the developed multiple file encryption using Rijndael Algorithm after utilizing the developed apps. The survey
instrument was validated by IT experts two from College of Engineering, Computer Studies and Technology and
two outsource.
The data collected were tabulated and analysed. Appropriated statistical tool were employed in the data analysis.
Mean was used to determine the usability of developed multiple file encryption using Rijndael Algorithm.
Round Transformation
Figure 2 Rijndael Algorithm Round Transformation
Developed Multiple
file Encryption using
Rijndael Algorithm
Usability of the
developed
Application

Figure 2 - According to the creator of Rijndael Algorithm the round transformation is broken into layers and this
layers are the linear mixing layer, which provides high diffusion over multiple rounds. The non-linear layer
which are basically application of the Rijndael S-box and the key addition layer which is simply an exclusive or
of the round key and the intermediate state. Each layer is designed to have its own well-defined function which
increases resistance to linear and different cryptanalysis.
Application Data Flow Diagram
Figure 3 Application Data Flow Diagram of the Study
Figure 3 – As illustrated in the data flow diagram of the study, the file/s (Plain Text) was process using Public
Key. Under Encryption is the application of the Rijndael Algorithm in which encrypting the file/s to hide the
originally contain/form by substituting special character and the like to protect from malicious users. Cipher
Text label is the output of the encrypted file/s that is not readable by human language or natural language.
Decryption process is the process to return the file/s into its original contain/form.
Encrypt Flow Chart
Figure 4 Encryption Flow Chart of the Study

Figure 4 – Encryption Flow Chart, using the sequential process in encrypting a file. The oval (Terminal) symbol
indicate that the flow chart started and ended. The Preparation/ Initialization symbol next to start, it signifies the
preparation of the data it is also use to select initial conditions and it is also used to represent instructions or
group of instructions that will alter or modify a program’s course of execution. The input / output symbol, data
are to be read into the computer memory from an input device or data are to be passed from the memory to an
output device, in this flow chart it is the input of 128 bytes password as a secret key. The diamond (Decision)
symbol, it signifies any decisions that are to be done, two alternative execution paths are possible. The path to be
followed is selected during the execution by testing whether or not the condition specified within the outline is
fulfilled. The rectangle (Processing) symbol, perform any calculation that are to be done. In decision symbol
there are two alternative execution paths the ‘Yes’ and ‘No’, if yes the remark is “File Encrypted Successfully”,
but if no the remark is “File Cannot be encrypted. Password Mismatch!” in this illustration it is password
mismatch, but sometimes it can be the file is to large. As the flow near to the end the output was successfully
encrypted with password protect to tighten the security of the encrypted file/s.
Decryption Flow Chart
Figure 5. Decryption Flow Chart of the Study
Figure 5 – The Decryption Flow Chart of the Study, is the reverse process to return the file/s into the original
contain/form. As stated in figure 4, the process is the same from start to initialize the file or selecting the file to
be decrypt. Then enter the password and test if the password is correct or incorrect. If not re-enter the password
and if correct proceed to successfully decrypt the file/s selected, and finally the original file/s can be read by
human or can be read using natural language.
RESULTS AND DISCUSSIONS
Table 1 Level of Usability of the Developed Application using Rijndael Algorithm
Indicators Mean Adjectival Rating
1. How do you rate the functionality of the apps in terms of performance? 3.03 Average
2. How do you rate the graphical user interface design of this apps? 2.96 Average
3. How do you rate operational performance of this apps? 2.95 Average
4. How do you rate the apps in terms of users-friendliness? 3.00 Average
5. How do you rate the security of the apps? 3.04 Average
Grand Mean 2.99 Average
Legend: 4.21-5.00-Excellent, 3.41-4.20-Good, 2.61-3.40-Average, 1.81-2.60-Poor, 1.00-1.80-Very Poor

Table 1 shows level of usability of the developed application. It reveals that all indicators are in the level of
“Average”. Thus, respondents give passing rate on the developed application. It implies that the program has
need some improvements to gain higher rating other than average rate application. Based in the mean shown in
table 1, the graphical user interface design and operational performance is the lesser mean. As the results shows
that’s the developer must improve the graphical user interface and operational performance of the developed
application.
Table 2 Factors level of Concept and Difficult
YES NO
1. Do you understand the concept of the developed apps? 99.13% 0.87%
2. Did you encounter any difficulty while using the apps? 2.61% 97.39%
Table 2 shows factors level of concept and difficult. As it is shown in the table among the respondents 99.13%
said ‘Yes’ they understand the concept of the developed application and 0.87% said ‘No’ they don’t understand
the concept of the develop application. It is also shown that 2.61% said ‘Yes’ they encountered difficulty while
using the application and 97.39% said ‘No’ they don’t encountered difficulty in using the develop application.
CONCLUSION
This study gets the usability of the Development
Multiple File Encryption using Rijndael Algorithm,
attempting to give free hassle from malicious
users/hackers. In developing multiple file encryption
using Rijndael Algorithm, developer must think about
the encryption application available in the internet. As
claim by Cyber Security Theory, to look into the
physical world and cyber world framework and
strongly recommend that the media must reorganized
the cyber world.
RECOMMENDATION
It is strongly recommended by the author of this
research to use the developed application as tool in
securing the file/s in your computer. As the researcher
recommend to use this application, it is also
recommend not to use file encryption / decryption
downloaded from the internet. Thus using application
that is available to all might be the reason of the file/s
corrupt and the file/s is not secure in some ways.
REFERENCES CITED
[1] Daemen, J., & Rijmen, V. (2013). The design of
Rijndael: AES-the advanced encryption
standard. Springer Science & Business Media.
Retrieve October 11, 2017 from
https://goo.gl/1DZm3n
[2] El Adib, S., & Raissouni, N. (2012). AES
encryption algorithm hardware implementation
architecture: resource and execution time
optimization. International Journal of
Information and Network Security, 1(2), 110.
https://goo.gl/4wJZ2x
[3] Hoang, T. (2012, February). An efficient FPGA
implementation of the Advanced Encryption
Standard algorithm. In Computing and
Communication Technologies, Research,
Innovation, and Vision for the Future (RIVF),
2012 IEEE RIVF International Conference
on (pp. 1-4). IEEE. Retrieve October 11, 2017
from https://goo.gl/eFfQUv
[4] Kaleigh (2000, November 15). Advanced
Encryption Standard. File. Retrieve October 10,
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[5] Mukhopadhyay, D., Sonawane, G., Gupta, P.
S., Bhavsar, S., & Mittal, V. (2013). Enhanced
security for cloud storage using file
encryption. arXiv preprint arXiv:1303.7075.
https://arxiv.org/abs/1303.7075
[6] Greenberg, A. (2016, June 03). ANDY GREEN
SECURITY. File. Retrieve October 10, 2017
from https://goo.gl/q3Q4gy
[7] Needham, R. M., & Schroeder, M. D. (1978).
Using encryption for authentication in large
networks of computers. Communications of the
ACM, 21(12), 993-999. Retrieve October 11,
2017 from https://goo.gl/dj9SeR
[8] Pitchaiah, M., & Daniel, P. (2012).
Implementation of advanced encryption
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from https://goo.gl/7wyzjX
[9] Rauno Kuusisto, Tuija Kuusisto (October
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with Rijndael Encryption Algorithm. Global
Journal of Computer Science and Technology.
https://goo.gl/H9ARHF
[11] Townsend, P. (2015, December 23). Fixing
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