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Definitions and Terminology
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Authentication
The act of verifying the identity of a user and the user’s eligibility to access computerised information. Authentication is designed to protect against fraudulent logon activity.
source: COBIT 4.0
the provision of assurance of the claimed identity of an entity. In case of user authentication, users are identified either by knowledge (e.g., password), by possession (e.g., token) or by a personal characteristic (biometrics). Strong authentication is either based on strong mechanisms (e.g., biometrics) or makes use of at least two of these factors (so-called multi-factor authentication).
source: ISO/IEC18028-4, 2005
The process of verifying that an individual or data really is who or what it is proclaimed to be. It is often used as a prerequisite for permitting access to resources in a system.
source: D. Schweitzer, 2003, Incident Response: Computer Forensics Toolkit
Process of verifying identity of an individual, device, or process
source: PCI DSS, 2008
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