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 is accurate.
Certification Authority A certification authority, or CA, is the person or company who issues digital certificates to subscribers. A specialized algorithm used to encrypt or decrypt data. Any commercial activity that takes place, at least in part, between connected computers is part of electronic commerce. The process of encoding data in a way that prevent unauthorized viewing, especially while the data is being transmitted. Keys Pieces of information that are used to encrypt or decrypt a message.