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2006
Springer

A New Mode of Encryption Providing a Tweakable Strong Pseudo-random Permutation

11 years 5 months ago
A New Mode of Encryption Providing a Tweakable Strong Pseudo-random Permutation
We present PEP, which is a new construction of a tweakable strong pseudo-random permutation. PEP uses a hash-encrypt-hash approach which has recently been used in the construction of HCTR. This approach is different from the encrypt-mask-encrypt approach of constructions such as CMC, EME and EME . The general hash-encrypt-hash approach was earlier used by Naor-Reingold to provide a generic construction technique for an SPRP (but not a tweakable SPRP). PEP can be seen as the development of the Naor-Reingold approach into a fully specified mode of operation with a concrete security reduction for a tweakable strong pseudo-random permutation. The security bound of HCTR which is also based on the Naor-Reingold approach is weaker than that of PEP. Compared to previous known constructions, PEP is the only construction of tweakable SPRP which uses a single key, is efficiently parallelizable and can handle an arbitrary number of blocks.
Debrup Chakraborty, Palash Sarkar
Added 23 Aug 2010
Updated 23 Aug 2010
Type Conference
Year 2006
Where FSE
Authors Debrup Chakraborty, Palash Sarkar
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