17 Dec
2003
17 Dec
'03
6:17 p.m.
"Peter Trei" writes:
The fastest general purpose, freely available des implementation I'm aware of is libdes. by Eric Young. With this, I can do a set_key in 15.8 us, and an ecb_encrypt in 95 us/block. That adds up to about 9,000 keytests/sec (this is on a 90 MHz P5, running NT).
I'll point out that like most DES implementations, Eric's tries to spend a lot of time in key setup to save time later on in encryption/decryption. This tradeoff would probably be very different if you didn't plan on trying more than one or two blocks of decryption after getting a key. Perry