Combination of ROT13 Cipher Algorithm and Tra...

Combination of ROT13 Cipher Algorithm and Transposition Cipher Algorithm to Caesar Cipher for Better Data Security

Author Name : Ms Pooja H P, Ms Sheetal Bandekar

DOI: https://doi.org/10.56025/IJARESM.2022.1081207

ABSTRACT

Encryption/decryption on cloud uses many algorithms like Atbash Cipher, ROT13 Cipher, Caesar Cipher, Transposition Cipher etc. Many researches have used combination of algorithms to make the encryption/decryption more complex like double substitution using a combination of Transposition Cipher and Caesar Cipher. This paper has shown the use of triple substitution using ROT13 Cipher and Transposition Cipher for encryption and the resultant encrypted data is given as an input to Caesar Cipher that results in a stronger encrypted data. While decrypting the data the algorithms are used in reverse order i.e. first the Caesar Cipher is used, then the Transposition Cipher is used and lastly ROT13 Cipher is used to generate the original data.  The time complexity is recorded and compared with double substitution using Transposition Cipher and Caesar Cipher. Encryption/decryption complexity is found to be better without compromising the time-complexity

Keywords:Cloud computing, Encryption/decryption, ROT13 Cipher, Caesar Cipher, Transposition Cipher, time complexity.