A Combination of Hill CIPHER-LSB in RGB Image Encryption

Abstract

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.

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Block-hash of blockchain framework against man-in-the-middle attacks

“…Information security is an important aspect that needs to be considered in building a system [10]. As the main gate of the system, has gaps and vulnerabilities, including sending and receiving the payload from the server as plain text, because it should be encrypted in sending the payload to maintain the payload's anonymity [11,12,13]. Security in the authentication process needs to be improved to deal with cyberattacks such as data sniffing, cross-site scripting (XSS), and man-in-the-middle attacks [14].…”

Analisa Algoritma Kriptografi Klasik Caesar Cipher Viginere Cipher dan Hill Cipher – Study Literature

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