A novel s-box design technique based on modular inverse and square transformation
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Date
2020
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Publisher
UMT Lahore
Abstract
Cryptography is an important field for making data confidential. Modern block ciphers in cryptography are the crucial and worthwhile techniques employed to provide secure communication. Permutation and substitution enhance the effectiveness and efficacy of block ciphers. For the purpose of substitution, block ciphers utilize substitution boxes. An S-Box plays an essential role to produce chaos between plaintext as well as cipher text. Many techniques are applied to construct cryptographically robust S-Boxes. The proposed method is based on modular inverse and square transformation for designing more efficient and solid S-Box. S-Box is passed through various criteria such as Nonlinearity, Strict Avalanche Criterion (SAC), Bit Independence Criterion (BIC), Linear Probability (LP), as well as Differential Probability (DP) to analyze the durability of S-Box. Comparison between proposed S-Box and previously designed S-Boxes demonstrates that the proposed S-Box is more viable than compared S-boxes. Consequences collected from criteria suggest that the proposed S-Box can be employed in modern ciphers.