Twofish in Brief

• 128-bit block
• 128-, 192-, or 256-bit key
• 16 rounds
• Works in all standard modes
• Encrypts data in:
  • 18 clocks/byte on a Pentium
  • 16.1 clocks/byte on a Pentium Pro
• Efficient key setup on large microprocessors
• Efficient on smart cards
• Efficient in hardware
• Extensively cryptanalyzed
• Unpatented
• Uncopyrighted
• Free

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