IACR News item: 07 July 2014
Daniel J. Bernstein, Chitchanok Chuengsatiansup, Tanja Lange
ePrint Report
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.
Additional news items may be found on the IACR news page.