An Efficient VLSI Implementation of the SMS4 Cipher Using a Twisted BDD S-Box Architecture
Year: 2025
Type: article
Abstract: SMS4 is a 128-bit block cipher that plays a key role in the WAP1 standard, primarily used for securing data packets within wireless local area networks (WLANs). This study begins by analyzing multiple S-box circuit designs, ultimately identifying the twisted Binary Decision Diagram (BDD) with m-4 configuration as the most efficient in terms of speed. Building upon this finding, a high-speed VLSI implementation of the SMS4 cipher was developed using the twisted BDD S-box. The resulting design demonstrated maximum operating frequencies exceeding 200 MHz on SMIC 0.18 µm CMOS technology and 100 MHz on Chartered 0.35 µm CMOS technology.
Authors: M. Siva Kumar, T.C. Sanjeeva Rayudu
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6949607993
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