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TSS Seminar: Mike Rosulek: "Reconciling Non-malleability with Homomorphic Encryption"

Event Type
Seminar/Symposium
Sponsor
Information Trust Institute
Location
2405 Siebel Center
Date
Nov 17, 2008   10:00 am  
Speaker
Mike Rosulek, University of Illinois at Urbana-Champaign
Originating Calendar
Information Trust Institute (ITI) archival calendar

ABSTRACT:

Homomorphic encryption schemes allow for very simple "computations" on encrypted data, and are therefore convenient tools in the design of conceptually simple cryptographic protocols. Non-malleability is a property of encryption schemes that is necessary when making security guarantees against active adversaries. However, these two desirable properties of encryption are mutually exclusive.

In this talk, I will discuss how these two opposing demands can be reconciled into a powerful notion for public-key encryption. An interesting application of these new results is an anonymous "opinion polling" protocol, which is efficient and conceptually simple, yet secure in a very strong sense. I will also discuss some relevant consequences regarding symbolic analysis of cryptographic protocols.

This is joint work with Manoj Prabhakaran.

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