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Recent progress on NFS imposed a new estimation of the security of pairings. In this work we study the best attacks against some of the most popular pairings. It allows us to propose new pairing-frien...
Optimal Updating of Ideal Threshold Schemes
Cryptology threshold schemes dynamic secret sharing
2009/3/27
We consider the problem of changing the parameters of an established ideal
(k, n)-threshold scheme without the use of secure channels. We identify the parameters
(k0, n0) to which such a scheme can ...
Updating the Parameters of a Threshold Scheme by Minimal Broadcast
Cryptology secret sharing schemes threshold schemes
2009/3/27
Threshold schemes allow secret data to be protected amongst a set of participants
in such a way that only a pre-specified threshold of participants can reconstruct the secret
from private informatio...
We consider the problem of efficient key management and user revocation in cryptographic file systems that allow shared access to files. A performance-efficient solution to user revocation in such sys...