31 search results - page 3 / 7 » Signatures on Randomizable Ciphertexts |
ASIACRYPT
2000
Springer
13 years 10 months ago
2000
Springer
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 ...
CISC
2008
Springer
13 years 7 months ago
2008
Springer
Anonymity is one of the main concerns in group-oriented cryptography. However, most efforts, for instance, group signatures and ring signatures, are only made to provide anonymity ...
ASIACRYPT
2009
Springer
14 years 7 days ago
2009
Springer
Group encryption (GE) schemes, introduced at Asiacrypt’07, are an encryption analogue of group signatures with a number of interesting applications. They allow a sender to encryp...
EUROCRYPT
1998
Springer
13 years 10 months ago
1998
Springer
Abstract. First, we introduce the notion of divertibility as a protocol property as opposed to the existing notion as a language property (see Okamoto, Ohta [OO90]). We give a defi...
ACNS
2007
Springer
13 years 12 months ago
2007
Springer
We present two transforms to acquire chosen ciphertext security from tag based techniques. The first one requires the separability of underlying primitives. By separability, info...