[willglynn]

I opened an issue:

https://github.com/wallix/awless/issues/39

PBKDF2, bcrypt, and scrypt are all used where a database needs to store something and check for equality, but where the values in the database need to not be reversible even if the database is breached. They might be suitable here.

[MichaelGG]

None of those can deal with the case of having too limited of an input range. Even if you use a million rounds, you've only added 2^20 to the workload.