MD5

• Message Digest 5

  • The 5th in the series

• One-way hash function

  • Objective is to detect change

• A cryptographic checksum

  • imagine you encrypt then checksum

• RSA would do great

  • but low performance

• Break the message into blocks

• Do nonlinear feedback shift registers on blocks.

• Add constants and repeat

• Repeat for block after block

• Print the result

100111011000100101001010100100

Result reads out the side

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