Welcome to the resource topic for 2014/526
Title:
Curve41417: Karatsuba revisited
Authors: Daniel J. Bernstein, Chitchanok Chuengsatiansup, Tanja Lange
Abstract:This paper introduces constant-time ARM Cortex-A8 ECDH software that (1) is faster than the fastest ECDH option in the latest version of OpenSSL but (2) achieves a security level above 2^200 using a prime above 2^400. For comparison, this OpenSSL ECDH option is not constant-time and has a security level of only 2^80. The new speeds are achieved in a quite different way from typical prime-field ECC software: they rely on a synergy between Karatsuba’s method and choices of radix smaller than the CPU word size.
ePrint: https://eprint.iacr.org/2014/526
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