139 search results - page 21 / 28 » On the Security of Two Key-Updating Signature Schemes |
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...
TCC
2005
Springer
14 years 27 days ago
2005
Springer
We address the problem of using untrusted (potentially malicious) cryptographic helpers. We provide a formal security definition for securely outsourcing computations from a comp...
IACR
2011
12 years 7 months ago
2011
Companies, organizations, and individuals often wish to share information to realize valuable social and economic goals. Unfortunately, privacy concerns often stand in the way of ...
COMCOM
2010
13 years 7 months ago
2010
In this paper, we consider QoS aware mesh networks that are maintained by multiple operators and they cooperate in the provision of networking services to the mesh clients. In ord...
IJISEC
2007
13 years 7 months ago
2007
Universal Re-encryption allows El-Gamal ciphertexts to be re-encrypted without knowledge of their corresponding public keys. This has made it an enticing building block for anonymo...