Originally Posted by http://perldoc.perl.org/functions/crypt.html

There is no decrypt function. This function isn't all that useful for cryptography (for that, look for Crypt modules on your nearby CPAN mirror) and the name "crypt" is a bit of a misnomer. Instead it is primarily used to check if two pieces of text are the same without having to transmit or store the text itself. An example is checking if a correct password is given. The digest of the password is stored, not the password itself. The user types in a password that is crypt()'d with the same salt as the stored digest. If the two digests match the password is correct.

Originally Posted by ashok.g

ok, Now my requirement is that some function like decrypt.... or can I find the source code of crypt() function?