| Digest::HMAC | Keyed-Hashing for Message Authentication |
| Digest::HMAC_MD5 | Keyed-Hashing for Message Authentication |
| Digest::HMAC_SHA1 | Keyed-Hashing for Message Authentication |
| Digest::MD2 | Perl interface to the MD2 Algorithm |
| Digest::MD5 | Perl interface to the MD5 Algorithm |