"J. Wren Hunt" wrote: > Does anyone happen to have any data illustrating roughly what the speed > differences are? Looking for graphs without having to do the analysis > myself if I can help it! :-) Pentium-2 300 MHz, gcc-2.95.4 C language AES implementation key length 128 bits, encrypt speed 84.2 Mbits/s key length 128 bits, decrypt speed 86.4 Mbits/s key length 192 bits, encrypt speed 71.0 Mbits/s key length 192 bits, decrypt speed 73.1 Mbits/s key length 256 bits, encrypt speed 61.0 Mbits/s key length 256 bits, decrypt speed 63.1 Mbits/s Optimized assembler AES implementation key length 128 bits, encrypt speed 134.3 Mbits/s key length 128 bits, decrypt speed 134.9 Mbits/s key length 192 bits, encrypt speed 113.7 Mbits/s key length 192 bits, decrypt speed 114.2 Mbits/s key length 256 bits, encrypt speed 98.3 Mbits/s key length 256 bits, decrypt speed 99.5 Mbits/s AMD Opteron 1593.7 MHz, gcc-3.2.2 C language AES implementation key length 128 bits, encrypt speed 690.0 Mbits/s key length 128 bits, decrypt speed 711.8 Mbits/s key length 192 bits, encrypt speed 588.3 Mbits/s key length 192 bits, decrypt speed 607.4 Mbits/s key length 256 bits, encrypt speed 507.7 Mbits/s key length 256 bits, decrypt speed 527.0 Mbits/s Optimized assembler AES implementation key length 128 bits, encrypt speed 1106.6 Mbits/s key length 128 bits, decrypt speed 1107.0 Mbits/s key length 192 bits, encrypt speed 932.3 Mbits/s key length 192 bits, decrypt speed 933.3 Mbits/s key length 256 bits, encrypt speed 807.8 Mbits/s key length 256 bits, decrypt speed 813.7 Mbits/s -- Jari Ruusu 1024R/3A220F51 5B 4B F9 BB D3 3F 52 E9 DB 1D EB E3 24 0E A9 DD - Linux-crypto: cryptography in and on the Linux system Archive: http://mail.nl.linux.org/linux-crypto/