Traitor Tracing without Trusted Authority from Registered Functional Encryption

ePrint Report: Traitor Tracing without Trusted Authority from Registered Functional Encryption

Pedro Branco, Russell W. F. Lai, Monosij Maitra, Giulio Malavolta, Ahmadreza Rahimi, Ivy K. Y. Woo

Traitor-tracing systems allow identifying the users who contributed to building a rogue decoder in a broadcast environment. In a traditional traitor-tracing system, a key authority is responsible for generating the global public parameters and issuing secret keys to users. All security is lost if the \emph{key authority itself} is corrupt. This raises the …

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