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New Protocols for Third-Party_Based Authentication and Secure Broadcast
 by Li Gong.

Abstract
This paper gives Needham-Schroeder style third-party-based authentication and key-distribution protocols that do not use conventional cryptosystems such as DES. The new protocols use polynomial interpolation and secure keyed one-way hash functions, and are efficient com pared with protocols using conventional cryptosystems. The same techniques are generalized to develop protocols for se elITe broadcast and for secure communication.
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