Planned key searches - note that I am also checking each key for its field negation because this is free to do:

  • Keys with few bits set
  • Keys with repeated bit patterns
  • Small keys
  • Keys that look suspiciously like pointers

Maybe, if I feel like it:

  • Keys from KDFs with low entropy inputs
  • PRNG stream output
  • CSPRNG stream output with weak seeds