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- W2951999829 startingPage "999" @default.
- W2951999829 abstract "A popular approach to tweakable blockcipher design is via masking, where a certain primitive (a blockcipher or a permutation) is preceded and followed by an easy-to-compute tweak-dependent mask. In this work, we revisit the principle of masking. We do so alongside the introduction of the tweakable Even-Mansour construction MEM. Its masking function combines the advantages of word-oriented LFSRand powering-up-based methods. We show in particular how recent advancements in computing discrete logarithms over finite fields of characteristic 2 can be exploited in a constructive way to realize highly efficient, constant-time masking functions. If the masking satisfies a set of simple conditions, then MEM is a secure tweakable blockcipher up to the birthday bound. The strengths of MEM are exhibited by the design of fully parallelizable authenticated encryption schemes OPP (nonce-respecting) and MRO (misuse-resistant). If instantiated with a reduced-round BLAKE2b permutation, OPP and MRO achieve speeds up to 0.55 and 1.06 cycles per byte on the Intel Haswell microarchitecture, and are able to significantly outperform their closest competitors." @default.
- W2951999829 created "2019-06-27" @default.
- W2951999829 creator A5032130714 @default.
- W2951999829 creator A5036662107 @default.
- W2951999829 creator A5047636942 @default.
- W2951999829 creator A5081064506 @default.
- W2951999829 date "2015-01-01" @default.
- W2951999829 modified "2023-09-29" @default.
- W2951999829 title "Improved Masking for Tweakable Blockciphers with Applications to Authenticated Encryption." @default.
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