113 search results - page 20 / 23 » Provable Security of ID-Based Proxy Signature Schemes |
CTRSA
2007
Springer
15 years 3 months ago
2007
Springer
Standard signature schemes are usually designed only to achieve weak unforgeability – i.e. preventing forgery of signatures on new messages not previously signed. However, most s...
ASIACRYPT
2009
Springer
15 years 4 months ago
2009
Springer
Group encryption (GE) schemes, introduced at Asiacrypt’07, are an encryption analogue of group signatures with a number of interesting applications. They allow a sender to encryp...
PKC
2007
Springer
15 years 3 months ago
2007
Springer
: This paper addresses the security of optimistic fair exchange in a multi-user setting. While the security of public key encryption and public key signature schemes in a single-us...
ACSC
2007
IEEE
15 years 4 months ago
2007
IEEE
In this paper we shall introduce a new electronic payment concept based on the popular direct debit payment model, entitled periodical payments. The direct debit model currently i...
DRM
2003
Springer
15 years 3 months 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...