Sciweavers

199 search results - page 3 / 40
» Adaptive Proofs of Knowledge in the Random Oracle Model
Sort
View
ASIACRYPT
2004
Springer
14 years 1 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
ASIACRYPT
2000
Springer
14 years 26 days ago
Security of Signed ElGamal Encryption
Assuming a cryptographically strong cyclic group G of prime order q and a random hash function H, we show that ElGamal encryption with an added Schnorr signature is secure against ...
Claus-Peter Schnorr, Markus Jakobsson
ASIACRYPT
2006
Springer
14 years 8 days ago
Simulation-Sound NIZK Proofs for a Practical Language and Constant Size Group Signatures
Non-interactive zero-knowledge proofs play an essential role in many cryptographic protocols. We suggest several NIZK proof systems based on prime order groups with a bilinear map...
Jens Groth
WEWORC
2007
132views Cryptology» more  WEWORC 2007»
13 years 9 months ago
Towards a Concrete Security Proof of Courtois, Finiasz and Sendrier Signature Scheme
Abstract. Courtois, Finiasz and Sendrier proposed in 2001 a practical code-based signature scheme. We give a rigorous security analysis of a modified version of this scheme in the...
Léonard Dallot
EUROCRYPT
2006
Springer
14 years 5 days ago
Practical Identity-Based Encryption Without Random Oracles
We present an Identity Based Encryption (IBE) system that is fully secure in the standard model and has several advantages over previous such systems
Craig Gentry