209 search results - page 33 / 42 » Secure Hash-and-Sign Signatures Without the Random Oracle |
CCS
2003
ACM
14 years 19 days ago
2003
ACM
We propose a new notion of cryptographic tamper evidence. A tamper-evident signature scheme provides an additional procedure Div which detects tampering: given two signatures, Div...
CTRSA
2007
Springer
13 years 9 months ago
2007
Springer
Abstract. Known compact e-cash schemes are constructed from signature schemes with efficient protocols and verifiable random functions. In this paper, we introduce a different ap...
JOC
2010
13 years 5 months ago
2010
We present a new encryption scheme which is secure against adaptive chosenciphertext attack (or CCA2-secure) in the standard model (i.e. without the use of random oracle). Our sch...
DRM
2003
Springer
14 years 19 days ago
2003
Springer
In PODC 2003, Park, Chong, Siegel and Ray [22] proposed an optimistic protocol for fair exchange, based on RSA signatures. We show that their protocol is totally breakable already...
PAIRING
2009
Springer
14 years 1 months ago
2009
Springer
Abstract. Efficient non-interactive zero-knowledge proofs are a powerful tool for solving many cryptographic problems. We apply the recent Groth-Sahai (GS) proof system for pairing...