118 search results - page 10 / 24 » Chosen Ciphertext Security with Optimal Ciphertext Overhead |
ACNS
2007
Springer
14 years 2 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...
ASIACRYPT
2000
Springer
14 years 6 days 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 ...
IJNSEC
2008
13 years 7 months ago
2008
A scheme for general group oriented ID-based cryptosystems is proposed. This scheme allows an authorized subset in the general access structure to cooperatively decrypt the cipher...
ICIC
2009
Springer
14 years 2 months ago
2009
Springer
Recently, proxy re-encryption scheme received much attention. In this paper, we propose a proxy re-encryption used for divert ciphertext from one group to another. The scheme is bi...
SCN
2008
Springer
13 years 7 months ago
2008
Springer
In this paper, we build, in a generic way, two asymmetric cryptosystems with a careful study of their security. We present first an additively homomorphic scheme which generalizes,...