Download PDF by Carlos Cid, Christian Rechberger: Fast Software Encryption: 21st International Workshop, FSE

By Carlos Cid, Christian Rechberger

This publication constitutes the completely refereed post-conference lawsuits of the twenty first overseas Workshop on speedy software program Encryption, held in London, united kingdom, March 3-5, 2014. The 31 revised complete papers provided have been rigorously reviewed and chosen from ninety nine preliminary submissions. The papers are prepared in topical sections on designs; cryptanalysis; authenticated encryption; foundations and thought; circulation ciphers; hash services; complicated constructions.

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Read or Download Fast Software Encryption: 21st International Workshop, FSE 2014, London, UK, March 3-5, 2014. Revised Selected Papers PDF

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Extra info for Fast Software Encryption: 21st International Workshop, FSE 2014, London, UK, March 3-5, 2014. Revised Selected Papers

Sample text

S x0 αs x1 αs x2 αs x3 αs x4 · · · αs xl For those states, the S-box layer and the L-box layer act independently: S − layer(α ⊗ x) = S(α) ⊗ x, L − layer(α ⊗ x) = α ⊗ L(x). Hence we have the same behavior for differences and for linear masks. Namely, we can build differential characteristics (resp. linear trails) where the differences (resp. selection masks) are written as tensor products. In particular, if L[x] = y, and α β with probability p through the S-box, then x ⊗ α y ⊗ β through one round with probability p|x| , where |x| denotes the Hamming weight of x.

Banerjee—Research supported by the fourth author’s grants. H. Brenner—Research supported by the ERC under the EU’s Seventh Framework Programme (FP/2007–2013) ERC Grant Agreement n. 307952. C. Peikert—This material is based upon work supported by the National Science Foundation under Grant CNS-0716786 and CAREER Award CCF-1054495, by the Alfred P. Sloan Foundation, by the Defense Advanced Research Projects Agency (DARPA) and the Air Force Research Laboratory (AFRL) under Contract No. FA8750-11-C-0098, and by BSF grant 2010296.

4 for a concrete security analysis. 3 Implementations and Performance We implement the two variants of SPRING described above, both for standalone evaluations on single inputs, and in a counter-like (CTR) mode that is able to amortize much of the work across consecutive evaluations. For the counter itself we use the Gray code, which is a simple way of ordering the strings in {0, 1}k so that successive strings differ in only one position. Then when running SPRING in counter mode, each successive subset-product can be computed from the previous one with just one more multiplication by either a seed element or its inverse.

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