## Cryptology ePrint Archive: Report 2018/258

Fault Analysis of the KTANTAN Family of Block Ciphers: A Revisited Work of Fault Analysis of the KATAN Family of Block Ciphers

Alya Geogiana Buja and Shekh Faisal Abdul-Latip and Rabiah Ahmad

Abstract: This paper investigates the security of the KTANTAN block cipher against differential fault analysis. This attack is considered to be first side channel analysis of KTANTAN in the literature. KTANTAN is a relative to the KATAN block cipher. Therefore, the previous fault analysis on KATAN family of block cipher is revisited. Similar to KATAN, KTANTAN has three variants namely KTANTAN32, KTANTAN48 and KTANTAN64. The inner structure of KTANTAN is similar to KATAN except the key schedule algorithms. KATAN has been practically broken by using fault analysis, employing a transient single-bit fault model, with the assumption is that the attacker is able to inject faults randomly into the internal state of the cipher. The attack is empowerd by extended cube method similarly as applied on KATAN. The complexity of this attack is $2^{74}$ for KTANTAN32 and $2^{76}$ for both KTANTAN48 and KTANTAN64. Furthermore, based on the obtained results, this paper concludes that KTANTAN is more robust against fault analysis compared to KATAN.

Category / Keywords: secret-key cryptography / block ciphers, cryptanalysis, implementation

Original Publication (in the same form): ICOCOE 2017

Date: received 8 Mar 2018

Contact author: shekhfaisal at utem edu my

Available format(s): PDF | BibTeX Citation

Short URL: ia.cr/2018/258

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