Abstract
Advanced Encryption Standard (AES) is a standard algorithm for block ciphers for providing security services. A number of variations of this algorithm are available in network security domain. In spite of the strong security features, this algorithm has been recently broken down by the cryptanalysis processes. Therefore, it is required to improve the security strength of this algorithm as AES is popular in commercial use. In this paper, we have shown the reasons of the loopholes in AES and also have provided a solution by using our Symmetric Random Function Generator (SRFG). The use of randomness in the key generation process in block cipher is novel in this domain. We have also compared our results with the original AES based upon some parameters such as nonlinearity, resiliency, balancedness, propagation characteristics, and immunity. The results show that our proposed version of AES is better in withstanding attacks.
Highlights
Cryptology is an important domain of security measure for providing confidentiality, authentication, and other services [1]
Cryptographic algorithms are broadly categorized in two ways: (a) block ciphers and stream ciphers depending upon the format of the message processing; (b) symmetric and asymmetric depending upon number of keys used for the algorithms [1]
(a) Word key generation (b) g function generating such relations or deducing keys from subkeys is getting faster with less complexity as we have seen in the literature review
Summary
Cryptology is an important domain of security measure for providing confidentiality, authentication, and other services [1]. Cryptographic algorithms are broadly categorized in two ways: (a) block ciphers and stream ciphers depending upon the format of the message processing; (b) symmetric and asymmetric depending upon number of keys used for the algorithms [1]. Designing such algorithms is another concern where a number of principles are needed to be maintained such as key size, message size, number of rounds, round function, and so on. The technology progress and enhancing computational ability of the attackers have urged a need of introducing new features in the function generators so that they can provide more strength to the ciphers.
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