A rule or procedure for solving a logical or mathematical problem.

The process of identifying an individual or data. In security systems, authentication is distinct from authorization. Authentication merely confirms that the identification of the individual or data i [..]

A certification authority, or CA, is the person or company who issues digital certificates to subscribers. They act as a trusted "third party" certifying the identity of the subscriber to an [..]

A specialized algorithm used to encrypt or decrypt data.

A process which can be used to attach to an electronic message a digital code that is unique to the "signer" of the message. A digital signature results from the use of a "Private Key&q [..]

The process of encoding data in a way that prevent unauthorized viewing, especially while the data is being transmitted. This process makes the data content unreadable to everyone except those who hav [..]

Pieces of information that are used to encrypt or decrypt a message. The key can "lock" data and make it unreadable, and a corresponding key can "unlock" that data and allow use of [..]

A number, greater than 1,  which has two divisors, 1 and itself.

A repository is a database that stores digital certificates, so that digitally signed messages can be verified for authenticity.