A New Design of Permutation Function Using Spiral Fibonacci in Block Cipher
Kamsiah Mohamed · International Journal of Advanced Trends in Computer Science and Engineering · 2020
Cryptography is an important part of information security that covers the investigation of algorithms and protocols for secure information.With the advance of technology, a new design of cryptographic algorithm is required to fulfil the new system requirements.This paper emphasizes on the new design of permutation function for improving security in modern block ciphers.The Spiral Fibonacci method is designed to rearrange or permute inputs of bits through the substitution boxes.Then, the experiment was conducted between the Spiral Fibonacci in the proposed block cipher and the ShiftRow in the Advanced Encryption Standard cipher.The correlation coefficient technique is used to examine the diffusion property of the new design of permutation function.The results showed that the values of Spiral Fibonacci indicate low correlation between plaintext and ciphertext.Thus, the proposed block cipher improved diffusion property between the plaintext and ciphertext.