A Very Compact Hardware Implementation of the KASUMI Block Cipher

Abstract : For mobile devices, this paper proposes a compact hardware (H/W) implementation for the KASUMI block cipher, which is the 3GPP standard encryption algorithm. In [4], Yamamoto et al. proposed the method of reducing temporary registers for the MISTY1 FO function (YYI-08), and implemented a very compact MISTY1 H/W. This paper aims to design the smallest KASUMI H/W by the application of YYI-08 to KASUMI, which has a similarly structured MISTY1 FO function. We discussed the applicability and found the problems on register competition and logical equivalence in the simple application, so we propose the new YYI-08 improved for KASUMI and the compact H/W architecture. According to our logic synthesis on a 0.11-μm ASIC process, the gate size is 2.99 Kgates, which is the smallest as far as we know.
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Pierangela Samarati; Michael Tunstall; Joachim Posegga; Konstantinos Markantonakis; Damien Sauveron. 4th IFIP WG 11.2 International Workshop on Information Security Theory and Practices: Security and Privacy of Pervasive Systems and Smart Devices (WISTP), Apr 2010, Passau, Germany. Springer, Lecture Notes in Computer Science, LNCS-6033, pp.293-307, 2010, Information Security Theory and Practices. Security and Privacy of Pervasive Systems and Smart Devices. 〈10.1007/978-3-642-12368-9_23〉
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Dai Yamamoto, Kouichi Itoh, Jun Yajima. A Very Compact Hardware Implementation of the KASUMI Block Cipher. Pierangela Samarati; Michael Tunstall; Joachim Posegga; Konstantinos Markantonakis; Damien Sauveron. 4th IFIP WG 11.2 International Workshop on Information Security Theory and Practices: Security and Privacy of Pervasive Systems and Smart Devices (WISTP), Apr 2010, Passau, Germany. Springer, Lecture Notes in Computer Science, LNCS-6033, pp.293-307, 2010, Information Security Theory and Practices. Security and Privacy of Pervasive Systems and Smart Devices. 〈10.1007/978-3-642-12368-9_23〉. 〈hal-01056077〉

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