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Erschienen in:
2011 | OriginalPaper | Buchkapitel
A Lightweight 256-Bit Hash Function for Hardware and Low-End Devices: Lesamnta-LW
verfasst von : Shoichi Hirose, Kota Ideguchi, Hidenori Kuwakado, Toru Owada, Bart Preneel, Hirotaka Yoshida
Erschienen in: Information Security and Cryptology - ICISC 2010
Verlag: Springer Berlin Heidelberg
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This paper proposes a new lightweight 256-bit hash function Lesamnta-LW with claimed security levels of at least 2
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with respect to collision, preimage, and second preimage attacks. We adopt the Merkle-Damgård domain extension; the compression function is constructed from a dedicated AES-based block cipher using the LW1 mode, for which a security reduction can be proven. In terms of lightweight implementations, Lesamnta-LW offers a competitive advantage over other 256-bit hash functions. Our size-optimized hardware implementation of Lesamnta-LW requires only 8.24 Kgates on 90 nm technology. Our software implementation of Lesamnta-LW requires only 50 bytes of RAM and runs fast on short messages on 8-bit CPUs.