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Browsing SE by Author "ABDUL MUQEET"

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    A NOVEL METHOD TO DESIGN THE SUBSTITUTION BOX BY AN INNOVATIVE CUBIC CHAOTIC MAP
    (UMT, Lahore, 2021) ABDUL MUQEET
    Cryptosystems are used to prove the security of confidential information and communication networks. For this purpose, various permutation and substitution processes are used. The process of substitution is performed by S-box. There are number of S-boxes that are developed but these are static or week so there is need to develop the strong and dynamic S-boxes. The modern day cipher use key dependent S-box that are dynamic. In this thesis the novel dynamic S-box is proposed. To determine the strength of proposed S-Box some standard tools are defined named as Bijectiveness, Nonlinearity, Strict Avalanche Criterion, Linear Probability, and Differential Uniformity. The results are compared with existing S-boxes.