NAME

       argon2-calibrate - a script to find the appropriate argon2 parameters

VERSION

       version 0.020

DESCRIPTION

       This program implements the following procedure, as recommended by the argon2 authors:

       1. Select the type "y". If you do not know the difference between them, choose Argon2id.
       2. Figure out the maximum number of threads "h" that can be initiated by each call to
       Argon2. This is the "parallelism" argument.
       3. Figure out the maximum amount of memory  "m" that each call can a afford.
       4. Figure out the maximum amount "x" of time (in seconds) that each call can a afford.
       5. Select the salt length. 16 bytes is suffient for all applications, but can be reduced
       to 8 bytes in the case of space constraints.
       6. Select the tag (output) size. 16 bytes is suffient for most applications, including key
       derivation.
       7. Run the scheme of type "y", memory "m" and "h" lanes and threads, using different
       number of passes "t". Figure out the maximum "t" such that the running time does not
       exceed "x". If it exceeds "x" even for "t = 1", reduce "m" accordingly. If using Argon2i,
       t must be at least 3.
       8. Hash all the passwords with the just determined values "m", "h", and "t".

AUTHOR

       Leon Timmermans <leont@cpan.org>

COPYRIGHT AND LICENSE

       This software is Copyright (c) 2013 by Daniel Dinu, Dmitry Khovratovich, Jean-Philippe
       Aumasson, Samuel Neves, Thomas Pornin and Leon Timmermans.

       This is free software, licensed under:

         The Apache License, Version 2.0, January 2004