scholarly journals Different Methods of Encryption and Decryption

2021 ◽  
Vol 9 (11) ◽  
pp. 170-177
Author(s):  
Pratiksha Satapure
Keyword(s):  
Information Security ◽  
Data Security ◽  
World Wide ◽  
Digital Information ◽  
Crucial Issue ◽  
Hill Cipher ◽  
Encryption And Decryption ◽  
Privacy Measures ◽  
Abstract Data ◽  
Cryptographic Techniques

Abstract: Data is any type of stored digital information. Security is about the protection of assets. Data security refers to protective digital privacy measures that are applied to prevent unauthorized access to computers, personal databases and websites. Cryptography is evergreen and developments. Cryptography protects users by providing functionality for the encryption of data and authentication of other users. Compression is the process of reducing the number of bits or bytes needed to represent a given set of data. It allows saving more data. Cryptography is a popular ways of sending vital information in a secret way. There are many cryptographic techniques available and among them AES is one of the most powerful techniques. The scenario of present day of information security system includes confidentiality, authenticity, integrity, nonrepudiation. The security of communication is a crucial issue on World Wide Web. It is about confidentiality, integrity, authentication during access or editing of confidential internal documents. Keywords: Cryptography, Hill Cipher, Homophonic Substitution Cipher, Monoalphabetic Cipher, Ceaser Cipher.

Message Security Using a Combination of Hill Cipher and RSA Algorithms

2021 ◽  
Vol 1 (1) ◽  
pp. 20-28
Author(s):  
Yogi Suryo Santoso
Keyword(s):  
Information Security ◽  
Data Confidentiality ◽  
Validity Data ◽  
Security Issues ◽  
Data Authentication ◽  
Hill Cipher ◽  
Data Validity ◽  
Mathematical Techniques ◽  
Cryptographic Techniques ◽  
Rsa Cryptography

The process of exchanging digital messages is increasingly being used due to its easy and practical use. But the process of exchanging digital messages is vulnerable to being tapped by unauthorized people. Cryptography is the study of mathematical techniques related to aspects of information security, such as data confidentiality, data validity, data integrity, and data authentication. With cryptography, the process of exchanging messages between two people can be done securely. Thus, cryptographic techniques are used to overcome security issues when exchanging messages. The methods used in this study are hybrid hill cipher and RSA cryptography. In this study it was shown that hybrid hill cipher cryptography with a 3x3 matrix key and RSA with a 512 bit key can overcome security issues when exchanging data so that messages sent cannot be read by unauthorized people.

scholarly journals Application of Hill Cipher Algorithm in Securing Text Messages

2018 ◽  
Author(s):  
Andysah Putera Utama Siahaan
Keyword(s):  
Computer Security ◽  
Matrix Theory ◽  
Text Messages ◽  
Symmetric Cryptography ◽  
Cryptographic Algorithm ◽  
Hill Cipher ◽  
Encryption And Decryption ◽  
The Matrix ◽  
Cryptographic Techniques ◽  
The Hill

Computer security aims to help users prevent fraud or detect fraud in an information-based system. The information must be secured to be free from threats. Cryptographic techniques can prevent data theft. One cryptographic algorithm is Hill Cipher. This algorithm is one symmetric cryptography algorithm. The Hill Cipher algorithm uses an m x m sized matrix as the key to encryption and decryption. The fundamental matrix theory used in Hill Cipher is multiplication between matrices and inverses the matrix. Hill Cipher has two types of matrices in general, 2 x 2 and 3 x 3. This study discusses the order 2 x 2. The application of Hill Cipher in text-shaped media is highly recommended because it has fast encryption and decryption speeds. This method is very good at securing data that will be transmitted on an open network.

Implementation of CAESAR CIPHER Cryptography Techniques for Android Based Information Data Security

2020 ◽  
Vol 4 (4) ◽  
pp. 627-634
Author(s):  
Fina Triana ◽  
Jon Endri ◽  
Irma Salamah
Keyword(s):  
Information Security ◽  
Open Source ◽  
Data Security ◽  
Coding System ◽  
Secure Information ◽  
Ascii Code ◽  
Cryptographic Techniques ◽  
Security Application ◽  
Design And Application ◽  
Application Design

Information data security is an important aspect of exchanging data and information. Data and information security can be done in various ways, including by using the cesarean cipher method in cryptographic techniques. The cesarean cipher method of cryptographic technique is a substitution coding system which is done by replacing each alphabet character with other characters along the 26 alphabet characters so that the coding only occurs in the alphabet itself without any other punctuation. This study proposes a modification to the cesarean cipher technique by adding to the number of characters used, namely 256 characters in the ASCII code. The caesar cipher application or CaesarApp uses the methodology of library study, consultation, application design and application testing. The implementation of the CaesarApp application was created using the open-source Android Studio 3.5 application. The results of tests conducted on the CaesarApp application note that the modification of the caesar cipher with 256 ASCII characters results in a secure information data security application, this application has a deficiency in reading limitations on ASCII characters, so characters cannot be read properly on android users.

scholarly journals Perancangan Aplikasi Penyandian Pesan Teks dengan Menggunakan Algoritma Digraph Cipher

2020 ◽  
Vol 2 (1) ◽  
pp. 25-34
Author(s):  
Yhopi Suhelna
Keyword(s):  
Data Security ◽  
Data Encryption ◽  
Third Parties ◽  
Security System ◽  
Science And Art ◽  
Encryption And Decryption ◽  
Secure Data ◽  
Cryptographic Techniques

Humans interact with fellow humans using communication. Not everything that is communicated contains a message so that it can be known by many people, sometimes the communication is confidential so that only certain people can know it. The occurrence of data tapping submitted is certainly a problem if the data is confidential, therefore a data security system is needed so that the data cannot be stolen or changed by tappers or crackers. One solution to secure data is to use cryptography. Cryptography is the science and art of maintaining message security when messages are sent from one media to another without experiencing interference from third parties. Through cryptographic techniques, data can be changed into passwords that are not understood and return them back to the original, this process is called data encryption and decryption. This data security process uses the Digraph Cipher method. Some facilities in the Digraph Cipher method are the keys used in the encryption and decryption process are the same (symmetrical) and the decryption process is the opposite of the encryption process.

scholarly journals A Combination of Hill CIPHER-LSB in RGB Image Encryption

2019 ◽  
pp. 241-248
Author(s):  
Rama Aria Megantara ◽  
Fauzi Adi Rafrastara ◽  
Syafrie Naufal Mahendra
Keyword(s):  
Travel Time ◽  
Data Security ◽  
Color Image ◽  
Measuring Instruments ◽  
Least Significant Bit ◽  
A Value ◽  
Hill Cipher ◽  
Technological Developments ◽  
Cryptographic Techniques ◽  
The Hill

The progress of the development of digital technology today, many people communicate by sending and receiving messages. However, along with extensive technological developments, many crimes were committed. In avoiding these crimes, data security needs to be done. Form of data security in the form of cryptography and steganography. One of the cryptographic techniques is the hill cipher algorithm. Hill ciphers include classic cryptographic algorithms that are very difficult to solve. While the most popular steganography technique is Least Significant Bit (LSB). Least Significant Bit (LSB) is a spatial domain steganography technique using substitution methods. This study discusses the merging of message security with hill cipher and LSB. The message used is 24-bit color image for steganography and text with 32, 64 and 128 characters for cryptography. The measuring instruments used in this study are MSE, PSNR, Entropy and travel time (CPU time). Test results prove an increase in security without too damaging the image. This is evidenced by the results of the MSE trial which has a value far below the value 1, the PSNR is> 64 db, the entropy value ranges from 5 to 7 and the results of travel time <1 second.

scholarly journals Cryptography: Security and Integrity of Data Management

2021 ◽  
Vol 1 (2) ◽  
pp. 1-9
Author(s):  
Faisal Abbasi ◽  
Keyword(s):  
World Wide Web ◽  
Data Management ◽  
Data Security ◽  
World Wide ◽  
Visual Cryptography ◽  
Internet Banking ◽  
The Internet ◽  
Digital Information ◽  
Unauthorized Access ◽  
Aes Algorithm

Internet always deals with data. Basically, data is any type of digital information that has been stored in the servers. With the advancement of technology, billion tons of da-ta have been accumulated over the internet. Protection of these data is very crucial as; theft of these data will lead to damages beyond imagination. Data Security is protection of these data and privacy, which prevent hacker from unauthorized access to computers, applications, and data servers. Data security is achieved by implementing Cryptography. Cryptography is a technique in which data is encrypted and stored in the databases, so that if by chance anyone gets access to these data, it will of no use to them. There are many cryptography algorithms that are widely used to encrypt and decrypt data, some of them are AES algorithm, stream ciphers, DES algorithms, etc. The concept of cryptography is not only limited to text encryption but also it has a wide application in visual cryptography, watermarking, steganography, etc. Now a day’s security of communication has become very important, especially after people have started using internet banking. Everything on world wide web is all about confidentiality, integrity, and authentication.

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.  

Implementasi Kriptografi Untuk Keamanan File Text Dengan Menggunakan Metode MD5

2020 ◽  
Vol 3 (2) ◽  
pp. 170-175
Author(s):  
Ahmad Zaki Fadilla Rangkuti ◽  
Hasanul Fahmi
Keyword(s):  
Information Security ◽  
Data Security ◽  
Text Message ◽  
Original Text ◽  
Text File ◽  
Security Systems ◽  
Application Program ◽  
Encryption And Decryption ◽  
Technological Developments

Technological developments, especially in data security systems in maintaining data information security, have developed rapidly. In maintaining the security of information data, there are branches of science in its development such as cryptography. Cryptography is both the science and the art of maintaining the security of messages obtained by encoding messages to become meaningless. There are two processes in cryptography, namely encryption and decryption. To be able to secure the text file, an encryption process is carried out by changing an original text message that can be understood (plaintext) into a message that has no meaning (ciphertext) which aims to prevent the message from being known by others. Decryption is the process of returning or changing incomprehensible text code (ciphertext) into original text that can be understood (plaintext). To secure the file, the MD5 method algorithm is implemented. With that, a cryptosystem application program that is used to secure text files is created so that only certain people can process the files..

A Novel Permutation Based Encryption Using Tree Traversal Approach.

2019 ◽  
Vol 13 ◽  
Author(s):  
T Sivakumar ◽  
S Veeramani ◽  
M Pandi ◽  
N Senthil Madasamy ◽  
Rakesh kumar
Keyword(s):  
Data Security ◽  
Binary Tree ◽  
Data Encryption ◽  
Digital Data ◽  
Digital Information ◽  
Internet Communication ◽  
Digital Form ◽  
Tree Traversal ◽  
Encryption And Decryption ◽  
Emerging Issues

: In 21st century one of the emerging issues is to secure the information stored and communicated in digital form. There is no assurance that the data we have sent may be hacked by any hacker and the data we have sent may reach correctly to the receiver or not. Thus, confidentiality, integrity, and authentication services play major role in Internet communication. Encryption is the process of encoding messages in such a way that only authorized parties can read and understand after successful decryption. Several data security techniques have been emerged in recent years, but still there is a need to develop new and different techniques to protect the digital information from attackers. This paper provides a new idea for data encryption and decryption using the notion of binary tree traversal to secure digital data. The proposed method is experimented and observed that the method is suitable for providing confidentiality service in real time.

scholarly journals PENGAMANAN DATA TEKS MELALUI PERPADUAN ALGORITMA BEAUFORT DAN CAESAR CIPHER

2019 ◽  
Vol 12 (2) ◽  
pp. 149-158
Author(s):  
Muhammad Fadlan ◽  
Sinawati Sinawati ◽  
Aida Indriani ◽  
Evi Dianti Bintari
Keyword(s):  
Data Security ◽  
Data Integrity ◽  
Text Data ◽  
Existing Problems ◽  
Digital Era ◽  
Encryption And Decryption ◽  
Different Types ◽  
Two Stages ◽  
Cryptographic Techniques

The importance of maintaining data integrity and security is one of the challenges in the current digital era. One method that can be used to face this challenge is through cryptography. In cryptography there are several algorithms that can be used, one of which is the Caesar cipher algorithm. This algorithm has several disadvantages, including a limited number of characters of 26 characters. This can make the encryption results easily recognizable by other parties. This study aims to design a proposal for maintaining data security through cryptographic techniques, while addressing the problems inherent in the Caesar cipher algorithm. The combination of Caesar and Beaufort algorithm is done to overcome the existing problems. In addition, a character list of 94 characters was determined to be used in the process of encryption and decryption of text data. The result, through the integration of these two algorithms, the text cipher becomes more difficult to solve. There are two stages of the encryption process by using two different types of Keys for each stage in securing data

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