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DES encryption module.
This is Crypt::DES_EDE3, a module implementing Triple-DES EDE (encrypt-decrypt-encrypt) encryption and decryption.
Crypt::DH is a Perl implementation of the Diffie-Hellman key exchange system. Diffie-Hellman is an algorithm by which two parties can agree on a shared secret key, known only to them. The secret is negotiated over an insecure network without the two parties ever passing the actual shared secret, or their private keys, between them.
Crypt::DH::GMP is a (somewhat) portable replacement to Crypt::DH, implemented mostly in C.
Crypt::DSA is an implementation of the DSA (Digital Signature Algorithm) signature verification system. This package provides DSA signing, signature verification, and key generation.
Crypt::OpenSSL::AES - A Perl wrapper around OpenSSL's AES library
Crypt::OpenSSL::Bignum - OpenSSL's multiprecision integer arithmetic