139 search results - page 20 / 28 » On the Security of Two Key-Updating Signature Schemes |
PODC
2003
ACM
14 years 20 days ago
2003
ACM
We propose a new cryptographic primitive called oblivious signaturebased envelope (OSBE). Informally, an OSBE scheme enables a sender to send an envelope (encrypted message) to a ...
PODC
2003
ACM
14 years 20 days ago
2003
ACM
Applications such as e-commerce payment protocols, electronic contract signing, and certified e-mail delivery require that fair exchange be assured. A fair-exchange protocol allo...
ASIACRYPT
2000
Springer
13 years 11 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 ...
ASIACRYPT
2010
Springer
13 years 5 months ago
2010
Springer
This paper investigates the Random Oracle Model (ROM) feature known as programmability, which allows security reductions in the ROM to dynamically choose the range points of an ide...
CSFW
2009
IEEE
14 years 2 months ago
2009
IEEE
For most basic cryptographic tasks, such as public key encryption, digital signatures, authentication, key exchange, and many other more sophisticated tasks, ideal functionalities...