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In this work a cryptographically robust S-box based on non-linear Cellular Automata rules has been developed. Properties suggest that the robustness of the proposed construction is better than that proposed by Seberry et al.[1]. Though the proposed S-box is not optimal to the linear and differential attacks like Rijndael S-box, its immunity towards linear cryptanalysis and robustness against differential...
NLS is a stream cipher proposal submitted to eSTREAM project. In SAC 2006 Cho and Pieprzyk presented a linear distinguishing attack called Crossword Puzzle attack on NLS where they have shown that the bias of the distinguisher is around O(2− 30). In this work we have proposed a new function modular Slash which is nonlinear in nature and strongly resistant against Linear Cryptanalysis. Replacing the...
In this paper, several algorithms for batch verification of ECDSA signatures are studied. The first of these algorithms is based upon the naive idea of taking square roots in the underlying field. In order to improve the efficiency beyond what can be achieved by the naive algorithm, two new algorithms are proposed which replace square-root computations by symbolic manipulations. Experiments carried...
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