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» Limits on the Usefulness of Random Oracles
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ASIACRYPT
2004
Springer
14 years 3 months ago
Eliminating Random Permutation Oracles in the Even-Mansour Cipher
Abstract. Even and Mansour [EM97] proposed a block cipher construction that takes a publicly computable random permutation oracle P and XORs different keys prior to and after appl...
Craig Gentry, Zulfikar Ramzan
FOCS
1992
IEEE
14 years 1 months ago
Proof Verification and Hardness of Approximation Problems
The class PCP(f(n), g(n)) consists of all languages L for which there exists a polynomial-time probabilistic oracle machine that uses O(f(n)) random bits, queries O(g(n)) bits of ...
Sanjeev Arora, Carsten Lund, Rajeev Motwani, Madhu...
TCC
2004
Springer
100views Cryptology» more  TCC 2004»
14 years 3 months ago
On the Random-Oracle Methodology as Applied to Length-Restricted Signature Schemes
In earlier work, we described a “pathological” example of a signature scheme that is secure in the Random Oracle Model, but for which no secure implementation exists. For that...
Ran Canetti, Oded Goldreich, Shai Halevi
TYPES
2004
Springer
14 years 3 months ago
A Machine-Checked Formalization of the Random Oracle Model
Abstract. Most approaches to the formal analysis of cryptography protocols make the perfect cryptographic assumption, which entails for example that there is no way to obtain knowl...
Gilles Barthe, Sabrina Tarento
IJSN
2006
96views more  IJSN 2006»
13 years 10 months ago
A new signature scheme without random oracles
In this paper, we propose a new signature scheme that is existentially unforgeable under a chosen message attack without random oracle. The security of our scheme depends on a new ...
Chik How Tan