Bitslice software implementation of KeeLoq as a side-channel countermeasure

Author(s):  
Pedro Malagón ◽  
Juan-Mariano de Goyeneche ◽  
David Fraga ◽  
José M. Moya
2020 ◽  
Vol 10 (7) ◽  
pp. 2454
Author(s):  
HanBit Kim ◽  
HeeSeok Kim ◽  
Seokhie Hong

With the increasing number of side-channel attacks, countermeasure designers continue to develop various implementations to address such threats. Power-balancing (PB) methods hold the number of 1s and/or transitions (i.e., Hamming weight/distance) of internal processes constant to ensure side-channel safety in an environment in which it is difficult to use random numbers. Most existing studies employed look-up tables (LUTs) to compute those operations, except for XOR and NOT operations. However, LUT-based schemes exhibit some side-channel issues in the address bits of LUTs. In this paper, we propose the application of AND and ADD operations to PB methods based on a rule that encodes 8-bit data into a 32-bit codeword without using LUTs. Unlike previous studies that employed LUTs, our proposals overcome side-channel vulnerabilities associated with the address bits and memory wastage. In addition, we evaluate the side-channel security ensured by the proposed method in comparison with that ensured by other methods. Finally, we apply our methods to SIMON/SPECK ciphers and analyze their performance by comparing them with older schemes.


2012 ◽  
Vol 132 (1) ◽  
pp. 9-12
Author(s):  
Yu-ichi Hayashi ◽  
Naofumi Homma ◽  
Takaaki Mizuki ◽  
Takafumi Aoki ◽  
Hideaki Sone

Author(s):  
Daisuke FUJIMOTO ◽  
Toshihiro KATASHITA ◽  
Akihiko SASAKI ◽  
Yohei HORI ◽  
Akashi SATOH ◽  
...  

Author(s):  
Huiqian JIANG ◽  
Mika FUJISHIRO ◽  
Hirokazu KODERA ◽  
Masao YANAGISAWA ◽  
Nozomu TOGAWA

Author(s):  
Hiroaki MIZUNO ◽  
Keisuke IWAI ◽  
Hidema TANAKA ◽  
Takakazu KUROKAWA

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