For outliers by random chance, lucasschm's reply explains. The usual trick for preventing folks _maliciously_ sending in outliers is to use a hash with a secre

For outliers by random chance, lucasschm's reply explains. The usual trick for preventing folks _maliciously_ sending in outliers is to use a hash with a secret key such as SipHash so that folks on the outside can't trivially figure out what inputs will lead to hashes with a lot of leading zeroes.