Schneier on Security: Twofish's Performance vs. Other Block Ciphers (on a Pentium)

Twofish's Performance vs. Other Block Ciphers (on a Pentium)

Algorithm	Key Length	Width (bits)	Rounds	Cycles	Clocks/Byte
Twofish	variable	128	16	8	18.1
Blowfish	variable	64	16	8	19.8
Square	128	128	8	8	20.3
RC5-32/16	variable	64	32	16	24.8
CAST-128	128	64	16	8	29.5
DES	56	64	16	8	43
Serpent	128, 192, 256	128	32	32	45
SAFER (S)K-128	128	64	8	8	52
FEAL-32	64, 128	64	32	16	65
IDEA	128	64	8	8	74
Triple-DES	112	64	48	24	116

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Sidebar photo of Bruce Schneier by Joe MacInnis.