International Journal of Engineering Research & Technology (IJERT), Volume 6, Issue 1

Vigenere Cipher Algorithm with Grayscale Image Key Generator for Secure Text File

Imam Saputra, Mesran Mesran, Nelly Astuti Hasibuan, Robbi Rahim


Dibaca : 210 kali | Kategori Publikasi : Internasional


ABSTRACT

With the changing of the times, information is crucial today especially for technological developments, especially in data security systems. In maintaining data security, there is a branch of science in its development, namely cryptography. Classical cryptography as vigenere cipher is a cryptographic algorithm implementation is very simple but quite powerful in his era. Having discovered methods kasiski, vigenere cipher algorithm is very easy to be analyzed by cryptanalyst to get a key. This is due to the relationship between the cipher, plaintext, and the key cryptography. The core used is usually composed of some characters arrangement either letters or numbers that are not too long, so it is easy to remember. So as to facilitate cryptanalyst to determine the key cryptography. To that end, the key must be an array of random characters long, so that the relationship between plaintext, ciphertext and key becomes very apparent that it would be difficult to solve by cryptanalyst. Which is the key arrangement of random characters that can obtain the pixel values of an image that being converted into ASCII characters? The pixel values of 8-bit grayscale images ranging from 0-255 equal the number of characters in the ASCII table. So that all pixel values in an 8-bit grayscale image can be converted into random characters and can be used as a key for the Vigenere Cipher Algorithm.


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REFERENCES


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Tag : Vigenere Cipher, Key Generator, Grayscale Image 8 Bit


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