34 search results - page 2 / 7 » Efficient Chosen Ciphertext Secure Public Key Encryption und... |
ICICS
2010
Springer
13 years 2 months ago
2010
Springer
Threshold public-key encryption (TPKE) allows a set of users to decrypt a ciphertext if a given threshold of authorized users cooperate. Existing TPKE schemes suffer from either lo...
ACNS
2009
Springer
13 years 2 months ago
2009
Springer
In this paper, we propose a notion of threshold tag-based encryption schemes that simplifies the notion of threshold identity-based encryption schemes, and we show a conversion fro...
EUROCRYPT
2009
Springer
14 years 5 months ago
2009
Springer
Recently, at Crypto 2008, Boneh, Halevi, Hamburg, and Ostrovsky (BHHO) solved the longstanding open problem of "circular encryption," by presenting a public key encrypti...
CCS
2009
ACM
14 years 5 months ago
2009
ACM
In a proxy re-encryption (PRE) scheme [4], a proxy, authorized by Alice, transforms messages encrypted under Alice's public key into encryptions under Bob's public key w...
CCS
2008
ACM
13 years 6 months ago
2008
ACM
The Unified Model (UM) key agreement protocol is an efficient Diffie-Hellman scheme that has been included in many cryptographic standards, most recently in the NIST SP 80056A sta...