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Advances in Cryptology – CRYPTO 2012: 32nd Annual Cryptology by Viet Tung Hoang, Ben Morris, Phillip Rogaway (auth.),

By Viet Tung Hoang, Ben Morris, Phillip Rogaway (auth.), Reihaneh Safavi-Naini, Ran Canetti (eds.)

This e-book constitutes the refereed complaints of the thirty second Annual foreign Cryptology convention, CRYPTO 2012, held in Santa Barbara, CA, united states, in August 2012. The forty eight revised complete papers offered have been rigorously reviewed and chosen from 225 submissions. the amount additionally includes the abstracts of 2 invited talks. The papers are prepared in topical sections on symmetric cryptosystems, safe computation, attribute-based and practical encryption, proofs platforms, protocols, hash capabilities, composable protection, privateness, leakage and side-channels, signatures, implementation research, black-box separation, cryptanalysis, quantum cryptography, and key encapsulation and one-way functions.

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Additional info for Advances in Cryptology – CRYPTO 2012: 32nd Annual Cryptology Conference, Santa Barbara, CA, USA, August 19-23, 2012. Proceedings

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Terashima The PMAC1 construction by Rogaway [28] builds a (parallelizable) VIL-PRF from a TBC, achieving birthday-bound security. Recently, Yasuda [34] introduced the PMAC plus construction, which has O(22n/3 ) security like TBCMAC2 but is more efficient and parallelizable. PMAC plus could be viewed as a construction over a tweakable blockcipher (which might be called the “XXE” construction, following Rogaway’s naming convention), but neither the construction nor the proof is cast this way. Separately, Yasuda [33] proves that Algorithm 6 from ISO 9797-1 and SUM-ECBC both have security against O(22n/3 ) queries.

C International Association for Cryptologic Research 2012 32 T. Iwata, K. Ohashi, and K. Minematsu contradict the claimed security bounds by the designers, and that no flaw in the proofs has been identified. , nonce reuse). Therefore, there is no attack that undermines the security bounds or their proofs. GCM uses the counter mode encryption, and the initial counter value is derived from a nonce, where there are two different ways to generate the initial counter value depending on the length of the nonce.

A tweakable blockcipher (TBC) is a function family E : K × (T × {0, 1}n) → {0, 1}n such that for every K ∈ K and T ∈ T ⊆ {0, 1}∗ the mapping EK (T, ·) is a permutation over {0, 1}n . The set T is called the tweakspace of the TBC, and the element T ∈ T is the tweak. Security notions. Let F : K × D → R be a function family, and let A be an adversary taking one oracle. Then we define FK (·) Advprf ⇒ 1 − Pr ρ ← Func(D, R) : Aρ(·) ⇒ 1 F (A) = Pr K ← K : A $ $ to be the PRF advantage of A attacking F .

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