## The 128-bit blockcipher CLEFIA. (Extended abstract).(English)Zbl 1186.94471

Biryukov, Alex (ed.), Fast software encryption. 14th international workshop, FSE 2007, Luxembourg, Luxembourg, March 26–28, 2007. Revised selected papers. Berlin: Springer (ISBN 978-3-540-74617-1/pbk). Lecture Notes in Computer Science 4593, 181-195 (2007).
Summary: We propose a new 128-bit blockcipher CLEFIA supporting key lengths of 128, 192 and 256 bits, which is compatible with AES. CLEFIA achieves enough immunity against known attacks and flexibility for efficient implementation in both hardware and software by adopting several novel and state-of-the-art design techniques. CLEFIA achieves a good performance profile both in hardware and software. In hardware using a $$0.09 \mu$$m CMOS ASIC library, about 1.60 Gbps with less than 6 Kgates, and in software, about 13 cycles/byte, 1.48 Gbps on 2.4 GHz AMD Athlon 64 is achieved. CLEFIA is a highly efficient blockcipher, especially in hardware.
For the entire collection see [Zbl 1143.68002].

### MSC:

 94A60 Cryptography 68P25 Data encryption (aspects in computer science)

### Keywords:

blockcipher; generalized Feistel structure; DSM; CLEFIA

CLEFIA
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