INRU: A Quasigroup Based Lightweight Block Cipher

TL;DR

This paper introduces INRU, a lightweight block cipher based on quasigroup transformations, demonstrating its robustness and statistical similarity to AES-128 across various modes of operation.

Contribution

The paper presents a novel quasigroup-based block cipher design and provides comprehensive security and statistical analysis, showing its competitiveness with AES-128.

Findings

Robust against differential, linear, and algebraic cryptanalysis

Statistical analysis comparable to AES-128 in multiple modes

Effective randomizing ability demonstrated

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.