Speaker: Hong-Sheng Zhou
 
Day:  Wednesday, 12/8/2004
Room: ITE 336
Time:  3:30pm-4:10pm 

Title: Short Signatures Without Random Oracles
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In this talk, I will present a recent signature scheme that appeared in Eurocrypt 2004.
The signature length is as short as DSA (the digital signature starndard). 
Amazingly, the scheme is proved to be secure in
the standard model. The signature length is much shorter than other signatures secure in standard model. 
This signature scheme is based on Bilinear Pairings, and a new hard problem, q-Strong Diffie-Hellman assumption.

In this talk, first I will introduce the proof model for secure signature: UF-CMA model, and  then prove the short signature scheme
secure in the UF-CMA model.

Reference:
http://crypto.stanford.edu/~dabo/papers/bbsigs.pdf

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