%0 Conference Proceedings %T A Very Compact Hardware Implementation of the KASUMI Block Cipher %+ Fujitsu Laboratories LTD. %A Yamamoto, Dai %A Itoh, Kouichi %A Yajima, Jun %< avec comité de lecture %( Lecture Notes in Computer Science %B 4th IFIP WG 11.2 International Workshop on Information Security Theory and Practices: Security and Privacy of Pervasive Systems and Smart Devices (WISTP) %C Passau, Germany %Y Pierangela Samarati; Michael Tunstall; Joachim Posegga; Konstantinos Markantonakis; Damien Sauveron %I Springer %3 Information Security Theory and Practices. Security and Privacy of Pervasive Systems and Smart Devices %V LNCS-6033 %P 293-307 %8 2010-04-12 %D 2010 %R 10.1007/978-3-642-12368-9_23 %K Block cipher %K KASUMI %K Hardware %K ASIC %K FPGA %K Compact Implementation %Z Computer Science [cs]/Digital Libraries [cs.DL]Conference papers %X 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. %G English %2 https://inria.hal.science/hal-01056077/document %2 https://inria.hal.science/hal-01056077/file/60330295.pdf %L hal-01056077 %U https://inria.hal.science/hal-01056077 %~ IFIP-LNCS %~ IFIP %~ IFIP-LNCS-6033 %~ IFIP-TC %~ IFIP-TC11 %~ IFIP-WISTP %~ IFIP-WG11-2 %~ IFIP-2010