250 search results - page 25 / 50 » Improving the Exact Security of Digital Signature Schemes |
INFORMATICALT
2007
13 years 7 months ago
2007
Recently, Chen, Chung, and Huang proposed a traceable proxy multisignature scheme based on the elliptic curve cryptosystem. However, this paper shows that the original signers can ...
ASIACRYPT
2003
Springer
13 years 11 months ago
2003
Springer
Motivated by privacy issues associated with dissemination of signed digital certificates, we define a new type of signature scheme called a `Universal Designated-Verifier Signatur...
NDSS
2003
IEEE
14 years 28 days ago
2003
IEEE
We study proactive two-party signature schemes in the context of user authentication. A proactive two-party signature scheme (P2SS) allows two parties—the client and the serverâ...
CSIE
2009
IEEE
14 years 2 months ago
2009
IEEE
Customers are usually passive in an electronic commerce transaction. Based on a new two times concurrent signature, this article presents a fair electronic payment (E-payment) pro...
ASIACRYPT
2006
Springer
13 years 11 months ago
2006
Springer
Non-interactive zero-knowledge proofs play an essential role in many cryptographic protocols. We suggest several NIZK proof systems based on prime order groups with a bilinear map...