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Computer Security Resource Center

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    Presentations 2021
Presentation

BUFFing signature schemes beyond unforgeability and the case of post-quantum signatures

June 9, 2021

Presenters

Rune Fiedler - TU Darmstadt

Description

Modern digital signature schemes can provide more guarantees than the standard notion of (strong) unforgeability, such as offering security even in the presence of maliciously generated keys, or requiring to know a message to produce a signature for it. The use of signature schemes that lack these properties has previously enabled attacks on real-world protocols. In this work we revisit several of these notions beyond unforgeability, establish relations among them, provide the first formal definition of non re-signability, and a transformation that can provide these properties for a given signature scheme in a provable and efficient way.

Event Details

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 Related Topics


            

                Security and Privacy:
                    post-quantum cryptography            

    


        

        






    


            Created June 09, 2021, Updated June 10, 2021