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Erschienen in:
2013 | OriginalPaper | Buchkapitel
Hashing Mode Using a Lightweight Blockcipher
verfasst von : Hidenori Kuwakado, Shoichi Hirose
Erschienen in: Cryptography and Coding
Verlag: Springer Berlin Heidelberg
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This article proposes a hashing mode using a lightweight blockcipher. Since the block size of a lightweight blockcipher is small, the hashing mode uses a double-block-length compression function that consists of two Matyas-Meyer-Oseas (MMO) modes. Tag-based applications often require a hash function to be a one-way function and a primitive for constructing a pseudorandom function. We analyze the one-wayness of the hashing mode and the pseudorandomness of the keyed hashing mode under standard assumptions of an underlying blockcipher. The analysis in the standard model is practically more significant than the analysis in the ideal-primitive model.