Fast generators for the Diffie-Hellman key agreement protocol and malicious standards

Details Fast generators for the Diffie-Hellman key agreement protocol and malicious standards Fast generators for the Diffie-Hellman key agreement protocol and malicious standards

2005-05-30

arxiv.org/abs/cs/0505082v4

Information Processing Letters 99 (2006), 145--148

Computer Science

Cryptography and Security

Small updates

Scientific paper

10.1016/j.ipl.2005.11.025

The Diffie-Hellman key agreement protocol is based on taking large powers of a generator of a prime-order cyclic group. Some generators allow faster exponentiation. We show that to a large extent, using the fast generators is as secure as using a randomly chosen generator. On the other hand, we show that if there is some case in which fast generators are less secure, then this could be used by a malicious authority to generate a standard for the Diffie-Hellman key agreement protocol which has a hidden trapdoor.

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