8 search results - page 2 / 2 » Oblivious Signatures |
PKC
2009
Springer
14 years 6 months ago
2009
Springer
In this work, we consider the task of allowing a content provider to enforce complex access control policies on oblivious protocols conducted with anonymous users. As our primary ...
ECCC
2007
13 years 5 months ago
2007
We show how to construct a variety of “trapdoor” cryptographic tools assuming the worst-case hardness of standard lattice problems (such as approximating the length of the sho...
JOC
2008
13 years 5 months ago
2008
In the setting of concurrent self composition, a single protocol is executed many times concurrently by a single set of parties. In this paper, we prove lower bounds and impossibi...