Performance of cryptography

• Very roughly, a commodity computer can do:

  • public-key (RSA 1024bits)
    • 20 signatures or 100 verifications/second
  • shared-key (DES, RC-4)
    • 10,000s encryptions/second
    • 1MByte/second
  • one-way hashing (MD5, SHA-1)
    • 100,000s hashes/second
    • 15MBytes/second, i.e. network speed

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