Welcome to the resource topic for 2009/475
Title:
Double-Exponentiation in Factor-4 Groups and its Applications
Authors: Koray Karabina
Abstract:In previous work we showed how to compress certain prime-order subgroups of certain cyclotomic subgroups by a factor of 4. We also showed that single-exponentiation can be efficiently performed using compressed representations. In this paper we show that double-exponentiation can be efficiently performed using factor-4 compressed representation of elements. In addition to giving a considerable speed up to the previously known fastest single-exponentiation algorithm for general bases, double-exponentiation can be used to adapt our compression technique to ElGamal type signature schemes.
ePrint: https://eprint.iacr.org/2009/475
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