Epochal Signatures for Deniable Group Chats
Andreas Hülsing, Florian Weber
2021Year
11Citations
1Top-tier citations
Abstract
We introduce formal definitions for deniability in group chats by extending a pre-existing model that did not have this property. We then introduce "epochal signatures" as an almost drop-in replacement for signatures, which can be used to make certain undeniable group-chats deniable by just performing that replacement. Following that we provide a practical epochal signature scheme and prove its security.
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