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Seminar Details

Date 28-5-2003
Time 14:30
Room/Location 214
Title ID-based Chameleon Hash and Applications
Speaker Giuseppe Ateniese
Affiliation Johns Hopkins University, Baltimore MD
Link http://www.cs.jhu.edu/~ateniese/
Abstract Chameleon signatures are non-interactive signatures based on a hash-and-sign paradigm which are similar to traditional digital signatures but with the distinguishing characteristic of being non-transferable, i.e., a designated recipient can verify that the signature is valid but cannot show this to others. In this talk, we introduce the first identity-based chameleon hash function and we explore novel applications of this primitive. The general advantages of identity-based cryptography over conventional schemes, relative to key distribution, are even more pronounced in a chameleon hashing scheme, because the owner of a public key does not necessarily need to retrieve the associated secret key.
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