Li-Xia Zhang

Security Analysis of a Modulo-216 Implementation Variant of the MBRISI Lightweight ARX Block Cipher: Weak Keys, Deterministic Differentials, and Equivalent Keys

: This paper presents an exact security evaluation of a closed modulo-2 16 implementation variant of the lightweight Add–Rotate–XOR (ARX) block cipher named MBRISI. We first resolve an arithmetic ambiguity in the original specification: modulo-65,537 addition on 16-bit words may produce the unrepresentable value 65,536...