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Title:
A Family of Block Ciphers Based on Multiple Quasigroups
Authors: Umesh Kumar, V. Ch. Venkaiah
Abstract:A family of block ciphers parametrized by an optimal quasigroup is proposed in this paper. The proposed cipher uses sixteen 4\times 4 bits S-boxes as an optimal quasigroup of order 16. Since a maximum of 16! optimal quasigroups of order 16 can be formed, the family consists of C^{16!}_1 cryptosystems. All the sixteen S-boxes have the highest algebraic degree and are optimal with the lowest linearity and differential characteristics. Therefore, these S-boxes are secure against linear and differential attacks. The proposed cipher is analyzed against various attacks, including linear and differential attacks, and we found it to be resistant to these attacks. The proposed cipher is implemented in C++, compared its performance with existing quasigroup based block
ciphers, and we found that our proposal is more efficient than existing quasigroup based proposals. We also evaluated our cipher using
various statistical tests of the NIST-STS test suite, and we found
it to pass these tests. We also established in this study that the
randomness of our cipher is almost the same as that of the AES-128.
ePrint: https://eprint.iacr.org/2022/1761
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