[Resource Topic] 2009/057: Anonymity in Shared Symmetric Key Primitives

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Anonymity in Shared Symmetric Key Primitives

Authors: Gregory M. Zaverucha, Douglas R. Stinson


We provide a stronger definition of anonymity in the context of shared symmetric key primitives, and show that existing schemes do not provide this level of anonymity. A new scheme is presented to share symmetric key operations amongst a set of participants according to a (t,n)-threshold access structure. We quantify the amount of information the output of the shared operation provides about the group of participants which collaborated to produce it.

ePrint: https://eprint.iacr.org/2009/057

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