|n.||1.||the process of converting messages in ordinary language, or other information into a secret coded form that cannot be interpreted without knowing the secret method for interpretation, called the |
|Noun||1.||encryption - the activity of converting from plain text into code|
|(algorithm, cryptography)||encryption - Any procedure used in cryptography
to convert plaintext into ciphertext (encrypted message)
in order to prevent any but the intended recipient from
reading that data.|
Schematically, there are two classes of encryption primitives: public-key cryptography and private-key cryptography; they are generally used complementarily. Public-key encryption algorithms include RSA; private-key algorithms include the obsolescent Data Encryption Standard, the Advanced Encryption Standard, as well as RC4.
The Unix command crypt performs a weak form of encryption. Stronger encryption programs include Pretty Good Privacy and the GNU Privacy Guard.
Other closely related aspects of cryptograph include message digests.