INRU: A Quasigroup Based Lightweight Block Cipher

Abstract

In this paper, we propose a quasigroup based block cipher design. The round functions of the encryption and decryption algorithms use quasigroup based string transformations. We show the robustness of the design against the standard differential, linear and algebraic cryptanalytic attacks. We also provide detailed statistical analysis using NIST test suite in CBC, CFB, OFB, and CTR modes of operation. We compare the statistical experimental results with the AES-128 in the same setup and conclude that the randomizing ability of our algorithm is equivalent to that of AES-128.