Abstract
This paper extends the provably-secure blockcipher construction proposed at FSE 2009 by Minematsu. Unlike the classical Luby-Rackoff cipher and its variants, the scheme is based on tweakable blockciphers. An advantage of the scheme is that it provides the beyond-birthday-bound security quite efficiently. While FSE 2009 proposal was the case of building a 2n-bit blockcipher using an n-bit tweakable blockcipher, we extend it to shorter and longer block lengths than 2n bits, keeping the security of beyond the birthday bound.
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Minematsu, K., Iwata, T. (2011). Building Blockcipher from Tweakable Blockcipher: Extending FSE 2009 Proposal. In: Chen, L. (eds) Cryptography and Coding. IMACC 2011. Lecture Notes in Computer Science, vol 7089. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-25516-8_24
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DOI: https://doi.org/10.1007/978-3-642-25516-8_24
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