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Efficient construction of (distributed) verifiable random functions
We give the first simple and efficient construction of verifiable random functions (VRFs).
VRFs, introduced by Micali et al.[13], combine the properties of regular pseudorandom …
VRFs, introduced by Micali et al.[13], combine the properties of regular pseudorandom …
Breaking and repairing optimistic fair exchange from PODC 2003
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 …
exchange, based on RSA signatures. We show that their protocol is totally breakable …
Separable and anonymous identity-based key issuing
In identity-based (ID-based) cryptosystems, a local registration authority (LRA) is
responsible for authentication of users while the key generation center (KGC) is responsible …
responsible for authentication of users while the key generation center (KGC) is responsible …
Time capsule signature
We introduce a new cryptographic problem called time capsule signature. Time capsule
signature is a 'future signature'that becomes valid from a specific future time t, when a trusted …
signature is a 'future signature'that becomes valid from a specific future time t, when a trusted …
Identity-based key issuing without secure channel in a broad area
S Kwon, SH Lee - International Workshop on Information Security …, 2006 - Springer
Despite many advantages of identity (ID)-based cryptosystems in removing certificates of
public keys over the traditional public key cryptosystems (PKC), some problems related to …
public keys over the traditional public key cryptosystems (PKC), some problems related to …