Scalable Deniable Group Key Establishment

Kashi Neupane (Atlanta Metropolitan State College, USA); Rainer Steinwandt and Adriana Suarez Corona (Florida Atlantic University, USA)

The popular Katz-Yung compiler from CRYPTO 2003 can be used to transform unauthenticated group key establishment protocols into authenticated ones. In this paper we present a modification of Katz and Yung' construction which maintains the round complexity of their compiler, but for typical unauthenticated group key establishments adds authentication in such a way that deniability is achieved as well. As an application, a deniable authenticated group key establishment with three rounds of communication can be constructed.






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