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Lightweight 8‐bit S‐box and combined S‐box/S‐box−1 for cryptographic applications
International Journal of Circuit Theory and Applications ( IF 1.581 ) Pub Date : 2021-05-03 , DOI: 10.1002/cta.3041
Bahram Rashidi

In this paper, a lightweight 8‐bit S‐box and combined S‐box/S‐box−1 with a security level equal to the AES S‐box is presented. From the viewpoint of hardware implementation, the S‐box has better hardware and timing complexities. The structure is based on an efficient field inversion and a low‐cost affine transformation. The field multiplications over urn:x-wiley:cta:media:cta3041:cta3041-math-0001 in the inversion circuit are implemented by resource sharing to reduces logic gates. The original equations of the inversion over urn:x-wiley:cta:media:cta3041:cta3041-math-0002 are optimally rewritten. In addition, a part of the S‐box called Part1 is optimized for reducing area and delay. This part consists of two addition operations, one multiplication, field squaring, and multiplication by constant λ, which all operations are over urn:x-wiley:cta:media:cta3041:cta3041-math-0003. The subblocks of Part1 are combined to generate a unified structure. Security analysis of the proposed S‐box showed that the structure has a security level equal to the Advanced Encryption Standard (AES) S‐box. The implementation results in 180‐ and 65‐nm Complementary metal oxide semiconductor (CMOS) technologies show the proposed S‐box and combined S‐box/S‐box−1 are comparable in terms of area, delay, and area × delay than most of the famous S‐boxes. The proposed S‐box is a high‐secure and area‐efficient S‐box as a good candidate for block ciphers.

中文翻译:

轻巧的8位S-box和组合的S-box / S-box-1适用于加密应用

本文提出了一种轻量级的8位S-box和组合的S-box / S-box -1,其安全级别等于AES S-box。从硬件实现的角度来看,S-box具有更好的硬件和时序复杂性。该结构基于有效的场反演和低成本的仿射变换。骨灰盒:x-wiley:cta:media:cta3041:cta3041-math-0001反向电路中的场乘法通过资源共享来实现,以减少逻辑门。骨灰盒:x-wiley:cta:media:cta3041:cta3041-math-0002最佳的反演原始方程式被重写。此外,S-box的一部分Part1已进行了优化,以减少面积和延迟。这部分包括两个加法运算,一个乘法,场平方和乘以常数λ,所有这些运算都结束了。骨灰盒:x-wiley:cta:media:cta3041:cta3041-math-0003。Part1的子块被组合以生成统一的结构。对提议的S-box的安全性分析表明,该结构的安全级别等于高级加密标准(AES)S-box。180纳米和65纳米互补金属氧化物半导体(CMOS)技术的实施结果表明,拟议的S-box和组合的S-box / S-box -1在面积,延迟和面积 × 延迟方面可比大多数著名的S盒 拟议的S-box是一种高安全性和面积高效的S-box,可作为分组密码的理想候选者。
更新日期:2021-05-04
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