Cryptology ePrint Archive: Report 2013/290

Massive Group Message Authentication with Revocable Anonymity

Boaz Catane and Amir Herzberg

Abstract: We present and implement schemes for authenticating messages from a group of users to a recipient, with revocable anonymity and massive (very high) message rate. Our implementations present a trade-off between the efficiency and the security required: from online group managers that participate in every message sent to offline managers, from assuming a trusted group manager and a trusted recipient to securing against both entities. All implementations have the {\em traceablity} feature, allowing to distributively and efficiently trace all messages that originated from a specific group member without violating anonymity of other members. In addition, our schemes are efficient and practical.

Category / Keywords: implementation / Digital signatures, Group signatures, Revocation, Efficient implementations

Date: received 16 May 2013, last revised 26 May 2013

Contact author: boaz catane at mail huji ac il

Available formats: PDF | BibTeX Citation

Version: 20130526:125453 (All versions of this report)

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