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Friday, March 6, Time: TCC introduced the notion of multi-client verifiable computation MVC in which a set of computationally weaker clients outsource to a powerful yet perhaps untrusted server the computation of a function f over their collective inputs in a sequence of time periods.
The task is to design a procedure for the clients to efficiently check the correctness of the answers without redoing the computation and further interactions. In this talk, I will review the problem of MVC, previous approaches, and their limitations.
Then I will discuss our new approaches to overcome the limitations and achieve stronger security guarantees. We developed a new technique - a distributed version of attribute-based encryption ABE that plays the central role of our construction.
I will elaborate on this method, and then discuss several generalizations, such as how to achieve input privacy, how to handle collusions among parties server-client, client-client collusions. I will point out both possibilities and impossibilities in various settings.
This is a joint work with S.
He obtained his Ph. His research interests include foundations of cryptography and their applications to scenarios in cloud computing and physical attacks.
Additionally, Feng-Hao is also interested in other topics such as mathematical aspects of cryptographic hardness assumptions and security amplifications.Abstract.
We propose a new and efficient signature scheme that is provably secure in the plain model. The security of our scheme is based on a discrete-logarithm-based assumption put forth by Lysyanskaya, Rivest, Sahai, and Wolf (LRSW) who also showed that it holds for generic groups and is independent of the decisional Diffie-Hellman assumption.
He obtained his Ph.D. at Brown University , under supervision of Anna Lysyanskaya. His research interests include foundations of cryptography and their applications to . Most of the material in this thesis is the result of joint work with Yevgeniy Dodis, Aggelos Kiayias, Anna Lysyanskaya, Antonio Nicolosi, Duong Hieu Phan, Danfeng Yao and Moti Yung.
g @ _ + _ +.)+' (' $),- #) & e$ $ $ _ $) #?? $?? $? _ /?? $? $) #%- - & #%) # (*# 1. Signature schemes are fundamental cryptographic primitives, useful as a stand-alone application, and as a building block in the design of secure protocols and other cryptographic objects.
In this thesis, we study both the uses that signature schemes find in protocols, and the design of signature. Anna Lysyanskaya Phd Thesis anna lysyanskaya phdTake The Next Step Toward Becoming A Leader In Your Field.
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