Tuesday, December 29, 2020

[cekykxxb] faster without collision resistance

cryptographic hash functions offer 3 features:

  1. first pre-image resistance
  2. second preimage resistance
  3. collision resistance

can one design a faster hash function that intentionally offers only a subset of these (e.g., just the first two)?  inspired by, although collision attacks exist against MD5 and SHA-1, the functions remain good for the other two uses.

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