This module contains a simple S/Key calculator (as described in RFC 1760) implemented in Perl. It exports the function `key' by default, and may optionally export the function `compute'. `compute_md4', `compute_md5', `key_md4', and `key_md5' are provided as convenience functions for selecting either MD4 or MD5 hashes. The default is MD4; this may be changed with with the `$Crypt::SKey::HASH' variable, assigning it the value of `MD4' or `MD5'. You can access any of these functions by exporting them in the same manner as `compute' in the above example. Most S/Key systems use MD4 hashing, but a few (notably OPIE) use MD5. WWW: http://search.cpan.org/dist/Crypt-SKey/