94 search results - page 6 / 19 » Proxy Re-signature Schemes Without Random Oracles |
ATC
2007
Springer
14 years 1 months ago
2007
Springer
A proxy signature scheme allows an entity to delegate its signing capability to another entity (proxy) in such a way that the proxy can sign messages on behalf of the delegator. Pr...
CISC
2009
Springer
13 years 5 months ago
2009
Springer
Abstract. Certificateless cryptography introduced by Al-Riyami and Paterson eliminates the key escrow problem inherent in identity based cryptosystems. Even though building practic...
AFRICACRYPT
2010
Springer
13 years 10 months ago
2010
Springer
Abstract. Proxy re-encryption (PRE) allows a semi-trusted proxy to convert a ciphertext originally intended for Alice into one encrypting the same plaintext for Bob. The proxy only...
EUROCRYPT
2006
Springer
13 years 11 months ago
2006
Springer
We present the first efficient group signature scheme that is provably secure without random oracles. We achieve this result by combining provably secure hierarchical signatures i...
CRYPTO
2005
Springer
14 years 1 months ago
2005
Springer
We investigate several previously suggested scenarios of instantiating random oracles (ROs) with “realizable” primitives in cryptographic schemes. As candidates for such “in...