scholarly journals Block Cipher Based Cryptographic Algorithm For Data Security

2014 ◽  
Vol 8 (3) ◽  
pp. 1424-1429
Author(s):  
Syed Hamid Hasan ◽  
Mohamed Salim Trigui ◽  
Anser Ghazzaal Ali Alquraishee
Keyword(s):  
Information Security ◽  
Data Security ◽  
Block Cipher ◽  
Great Increase ◽  
The Public ◽  
Business Information ◽  
Cryptographic Algorithm ◽  
Stored Information

The process of protecting the accessibility,  reliability, and secrecy of information is called Information security. We see a great increase in accessing of computer databases for stored information. Increasing number of companies are storing individual and business information on computers. Most of this information is not meant for the public eyes and is very sensitive. The following paper discusses the development of a block cipher based cryptographic algorithm that uses the logical gates like XOR and other shifting operations. The results of the experiment prove the algorithm to be efficient and secure.

scholarly journals Color Image Encryption using AES and RSA

2020 ◽  
Vol 9 (5) ◽  
pp. 547-550
Keyword(s):  
Data Security ◽  
Block Cipher ◽  
Color Image ◽  
Signal To Noise Ratio ◽  
Security Level ◽  
Change Rate ◽  
The Public ◽  
Key Block ◽  
Symmetric Key ◽  
Encryption Algorithms

Information security is an important task on multimedia and communication world. During storing and sharing maintaining a strategic distance from the outsider access of information is the difficult one. There are many encryption algorithms that can provide data security. In this paper two of the encryption algorithms namely AES and RSA are implemented for color images. AES (Advanced Encryption Standard) is a symmetric key block cipher published in December 2001 by NSIT (National Institute of Standards and Technology). RSA (Rivest-Shamir-Adleman) is an asymmetric key block cipher. It uses two separate keys, one for encryption called the public key and other for decryption called the private key. Both the implementation and analysis are done in Matlab. The quality and security level of both the algorithms is analysed based on various criteria such as Histogram analysis, Correlation analysis, Entropy analysis, NPCR (Number of Pixel Change Rate), UACI (Unified Average Changing Intensity), PSNR (Peak Signal-to-Noise Ratio).

scholarly journals Encryption of DES Algorithm in Information Security

2018 ◽  
Author(s):  
Andysah Putera Utama Siahaan
Keyword(s):  
Information Security ◽  
Data Security ◽  
Block Cipher ◽  
Personal Data ◽  
Block Size ◽  
Data Encryption ◽  
Business Practices ◽  
Security Systems ◽  
Data Encryption Standard ◽  
Private Key

Information security is the protection of personal and non-personal data from various threats to guarantee privacy. For business practices, data security can reduce business risk, and increase the return of investment and business opportunities. In designing information system security systems, there are information security aspects that need to be considered. Many threats will come before the information circulating. Information is a matter that will be targeted by wild parties. Cryptographic algorithms are needed to protect data from these threats. Data Encryption Standard (DES) belongs to the symmetry cryptography system and is classified as a block cipher type. DES operates on 64-bit block size. DES encrypts 64 plaintext bits into 64-bit ciphertext using 56 private key bits or subkeys. The internal key is generated from an external key that is 64 bits long. The DES method is an excellent cryptographic technique used to secure data. DES has 16 rounds to ensure safer data against unexpected attacks. Applying DES to data encryption will be very useful for protecting data.

scholarly journals An integrated approach for enhancing data security

2018 ◽  
Vol 7 (2) ◽  
pp. 880
Author(s):  
G Manikandan ◽  
R Jeeva Dharani ◽  
R Maya
Keyword(s):  
Information Security ◽  
Data Security ◽  
Virtual World ◽  
Security Analysis ◽  
Integrated Approach ◽  
The Internet ◽  
Plain Text ◽  
Cryptographic Algorithm ◽  
Cryptographic Techniques ◽  
The Web

Information security is a key challenge in today’s information era where a huge volume of data is being generated on the internet as a result of the online transaction. This data needs to be protected from the unauthorized users on the web. Cryptography is used to ensure the confidentiality and integrity of data in the virtual world. The strength of the cryptographic algorithm relies on the complexity involved in retrieving the original content from the unintelligible information. The system proposed in this paper focuses on the use of a different mechanism to increase complexity involved in the cryptanalysis. Different cryptographic techniques are used to create a modified plain text and modified key. The newly generated key is used to encrypt the modified plaintext to generate the ciphertext. From the security analysis, it is evident that the time taken for cryptanalysis by the proposed scheme is more when compared with the existing systems.  

scholarly journals Implementation of Rivest Shamir Adleman Algorithm (RSA) and Vigenere Cipher In Web Based Information System

2018 ◽  
Vol 31 ◽  
pp. 10007 ◽  
Author(s):  
Aryanti Aryanti ◽  
Ikhthison Mekongga
Keyword(s):  
Data Security ◽  
Data Encryption ◽  
Public Key ◽  
Test Results ◽  
File Size ◽  
Web Based ◽  
The Public ◽  
Cryptographic Algorithm ◽  
Encryption And Decryption ◽  
The Moment

Data security and confidentiality is one of the most important aspects of information systems at the moment. One attempt to secure data such as by using cryptography. In this study developed a data security system by implementing the cryptography algorithm Rivest, Shamir Adleman (RSA) and Vigenere Cipher. The research was done by combining Rivest, Shamir Adleman (RSA) and Vigenere Cipher cryptographic algorithms to document file either word, excel, and pdf. This application includes the process of encryption and decryption of data, which is created by using PHP software and my SQL. Data encryption is done on the transmit side through RSA cryptographic calculations using the public key, then proceed with Vigenere Cipher algorithm which also uses public key. As for the stage of the decryption side received by using the Vigenere Cipher algorithm still use public key and then the RSA cryptographic algorithm using a private key. Test results show that the system can encrypt files, decrypt files and transmit files. Tests performed on the process of encryption and decryption of files with different file sizes, file size affects the process of encryption and decryption. The larger the file size the longer the process of encryption and decryption.

DATA SECURITY USING RC6 CIPHER ALGORITHM AS AN IMPLEMENTATION OF PRIVACY PRINCIPLE IN THE UU-ITE PERSPECTIVE AND ISLAMIC LAW

2020 ◽  
Author(s):  
Dedy Agung Prabowo ◽  
Ujang Juhardi ◽  
Bambang Agus Herlambang
Keyword(s):  
Information Technology ◽  
Information System ◽  
Computer Technology ◽  
Data Security ◽  
Block Cipher ◽  
Islamic Law ◽  
Important Thing ◽  
Is Security ◽  
Privacy Principle ◽  
System Data

Recently, Information technology develops rapidly. It is possible for us to get some informationquickly, properly and efficiently. The information technology also has many advantages fo r people. Theneed for information is increasing according to the need of its users. This proves that informationtechnology can make our job easier and it can help us to save our time particularly for the job thatrelated to information and data processin g. With the increasing use of computer technology today, italso brings up some problems. One of them is security and confidentiality problem which is animportant aspect in an information system. Data security is an important thing in maintaining theconf identiality of particular data that only can be known by those who have right. RC6 is a symmetrickey algorithm which encrypts 128 bit plaintext blocks to 128 bit ciphertext blocks. The encryptionprocess involves four operations which is the critical arit hmetic operation of this block cipher. As alegal state, Indonesia has issued a regulation in a form of laws governing information and electronictransaction or commonly referred to UU ITE. Besides, Islam is a religion that comprehensively givesthe guidan ce of life for people. Islam has provided guidance in the various fields ranging from social,politics, economics and various other fields.

scholarly journals on subliminal cryotography

2006 ◽  
Vol 3 (1) ◽  
pp. 124-130
Author(s):  
Baghdad Science Journal
Keyword(s):  
Information Security ◽  
Computer Science ◽  
Block Cipher

in recent years cryptography has played a big role especially in computer science for information security block cipher and public

scholarly journals Prevention of Information Security Incidents in Automated Information System

2020 ◽  
pp. 45-51
Author(s):  
Igor Butusov ◽  
◽  
Aleksandr Romanov ◽  
Keyword(s):  
Information System ◽  
Information Security ◽  
Theoretical Computer Science ◽  
Structured Data ◽  
Fuzzy Information ◽  
Security Incident ◽  
Automated Information System ◽  
Computer Attacks ◽  
Stored Information ◽  
Security Incidents

The purpose of the article is to support the processes of preventing information security incidents in conditions of high uncertainty. Method: methods of mathematical (theoretical) computer science and fuzzy set theory. Result: an information security Incident, including a computer incident, is considered as a violation or termination of the functioning of an automated information system and (or) a violation of information stored and processed in this system, including those caused by a computer attack. Information descriptions are presented in the form of structured data about signs of computer attacks. Structured data is the final sequence of strings of symbols in a formal language. The Damerau-Levenstein editorial rule is proposed as a metric for measuring the distance between strings of characters from a particular alphabet. The possibility of presenting the semantics of information descriptions of attack features in the form of fuzzy sets is proved. Thresholds (degrees) of separation of fuzzy information descriptions are defined. The influence of semantic certainty of information descriptions of features (degrees of blurring of fuzzy information descriptions) on the decision-making about their identity (similarity) is evaluated. It is shown that the semantic component of information descriptions of signs of computer attacks presupposes the presence of some semantic metric (for its measurement and interpretation), which, as a rule, is formally poorly defined, ambiguously interpreted and characterized by uncertainty of the type of fuzziness, the presence of semantic information and the inability to directly apply a probabilistic measure to determine the degree of similarity of input and stored information descriptions of signs. An approach is proposed to identify fuzzy information descriptions of computer attacks and to apply methods for separating elements of reference sets on which these information descriptions are defined. It is shown that the results of the procedure for identifying fuzzy information descriptions of computer attacks depend on the degree of separation of the reference sets and on the indicators of semantic uncertainty of these descriptions

scholarly journals Analisis Tingkat Keamanan Aplikasi SIMAK Menggunakan Standard ISO/IEC 27002:2013 (Studi Kasus: UPTTIK Universitas Siliwangi)

2021 ◽  
Vol 6 (2) ◽  
Author(s):  
Iyos Rosidin Pajar
Keyword(s):  
Information Technology ◽  
Information Security ◽  
Data Security ◽  
Security Policies ◽  
Management Processes ◽  
Organizational Information ◽  
Iec 27002 ◽  
The University ◽  
Level 2 ◽  
Security Concern

The issue of data security seems to be one of the most intriguing topics to observe in the development of information technology in recent time/. The information technology related to the management processes, one of which is the SIMAK application at   the University of Siliwangi needs a higher security concern. This study aims to determine the level of security of the SIMAK application in which the researchers can provide recommendations to SIMAK managers. This could be the basis for the future improvements. Researchers used 4 domains from ISO / IEC 27002: 2013, namely domain 5, it contains information security policies. Domain 6, it contains organizational information security. Domain 9, it contains access control. Lastly, Domain 11, it contains physical and environmental security.  When they are specified from the four domains, 38 controls are obtained. Security, from the results of the questionnaire and weighting, the result of the 5 domains maturity value is= 1.49, the result of the domain 6 maturity value is= 1.52, while domain 9 maturity value is= 1.32 and domain 11 maturity value constitute to 1.97.  If it is averaged,  the Siliwangi University SIMAK application is at level 2 or repeatable.

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