Machine Theory

Applied Cryptography and Network Security: 12th by Ioana Boureanu, Philippe Owesarski, Serge Vaudenay

By Ioana Boureanu, Philippe Owesarski, Serge Vaudenay

This publication constitutes the refereed complaints of the twelfth foreign convention on utilized Cryptography and community safeguard, ACNS 2014, held in Lausanne, Switzerland, in June 2014. The 33 revised complete papers incorporated during this quantity have been rigorously reviewed and chosen from 147 submissions. they're equipped in topical sections on key alternate; primitive development; assaults (public-key cryptography); hashing; cryptanalysis and assaults (symmetric cryptography); community safeguard; signatures; procedure safety; and safe computation.

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Extra resources for Applied Cryptography and Network Security: 12th International Conference, ACNS 2014, Lausanne, Switzerland, June 10-13, 2014. Proceedings

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Though the MS model is slightly restrictive than the plain model, it is very reasonable assumption because it is very easy to implement. We construct a (concurrently secure) three-move PAKE scheme in the MS model (justly without random oracles) based on the Groce-Katz PAKE scheme. The main ingredient of our scheme is the multi-string simulation-extractable non-interactive zero-knowledge proof that provides both the simulation-extractability and the extraction zero-knowledge property even if minority authorities are malicious.

Almost all existing password-based authenticated key exchange (PAKE) schemes achieve concurrent security in the standard model by relying on the common reference string (CRS) model. A drawback of the CRS model is to require a centralized trusted authority in the setup phase; thus, passwords of parties may be revealed if the authority ill-uses trapdoor information of the CRS. , containing a linear number of rounds). In this paper, we discuss how to relax the setup assumption for (constant round) PAKE schemes.

2. Enc(pkB , KA || NA ) under B’s public key pkB and transmits CA to B. B Meanwhile, B sets T1B := TKE || A || B and computes NB := CRHF(T1B ). Enc(pkA , KB || NB ) under A’s public key pkA . B B , B sets T2B := T1B || CA || CB and com3. Upon receiving the ciphertext CA B B B B putes RB := CRHF(T2 ). e. Dec(skB , New Modular Compilers for Authenticated Key Exchange 17 B CA )). Then B checks whether NAB = NB . If the check is not passed, then B B rejects. Tag(KA , “2” || RB ) and transmits (MB , CB ) to A.

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