> > And why is there such a large discrepancy between cryptoapi's AES > > CPU time and loop-AES's AES CPU time? Context switching? > ...assembler versus C version... :-) Will there in the future come an assembler version (Pentium optimized, like the one in loop-AES) of the AES cipher to cryptoapi? This way the speed difference between loop-AES and cryptoapi would be minimized. Med venlig hilsen / Best Regards Thor Dreier - Linux-crypto: cryptography in and on the Linux system Archive: http://mail.nl.linux.org/linux-crypto/