Not sure what you mean by standard encryption method. You could be referring to the crypt function. From perdoc perlfunc:

crypt

crypt PLAINTEXT,SALT

Encrypts a string exactly like the crypt(3) function in the C library (assuming that you actually have a version there that has not been extirpated as a potential munition). This can prove useful for checking the password file for lousy passwords, amongst other things. Only the guys wearing white hats should do this.

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In terms of encryption in general, there are many modules available on CPAN.