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Please use this identifier to cite or link to this item: http://dyuthi.cusat.ac.in/purl/4519

Title: Matrix based Key Generation to Enhance Key Avalanche in Advanced Encryption Standard
Authors: Mythili, P
Paul, A J
Poulose Jacob,K
Keywords: Ciphertext
Encryption
Plaintext
Key avalanche
Secret key
Sub-key
Issue Date: 2011
Publisher: International Journal of Computer ApplicationsĀ® (IJCA)
Abstract: In symmetric block ciphers, substitution and diffusion operations are performed in multiple rounds using sub-keys generated from a key generation procedure called key schedule. The key schedule plays a very important role in deciding the security of block ciphers. In this paper we propose a complex key generation procedure, based on matrix manipulations, which could be introduced in symmetric ciphers. The proposed key generation procedure offers two advantages. First, the procedure is simple to implement and has complexity in determining the sub-keys through crypt analysis. Secondly, the procedure produces a strong avalanche effect making many bits in the output block of a cipher to undergo changes with one bit change in the secret key. As a case study, matrix based key generation procedure has been introduced in Advanced Encryption Standard (AES) by replacing the existing key schedule of AES. The key avalanche and differential key propagation produced in AES have been observed. The paper describes the matrix based key generation procedure and the enhanced key avalanche and differential key propagation produced in AES. It has been shown that, the key avalanche effect and differential key propagation characteristics of AES have improved by replacing the AES key schedule with the Matrix based key generation procedure
Description: International Conference on VLSI, Communication & Instrumentation (ICVCI) 2011
URI: http://dyuthi.cusat.ac.in/purl/4519
Appears in Collections:P Mythili

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