Access control

thumb|ATM user authenticating himself Authentication (from authentikos, "real, genuine", from αὐθέντης authentes, "author") is the act of proving an assertion, such as the identity of a computer system user. In contrast with identification, the act of indicating a person or thing's identity, authentication is the process of verifying that identity.

selective restriction of access to a place or other resource, allowing only authorized users

Authorization or authorisation (see spelling differences), in information security, computer security and IAM (Identity and Access Management), is the function of specifying rights/privileges for accessing resources, in most cases through an access policy, and then deciding whether a particular subject has privilege to access a particular resource. Examples of subjects include human users, computer software and other hardware on the computer. Examples of resources include individual files or an item's data, computer programs, computer devices and functionality provided by computer applications

thumb|Old turnstiles at Alewife (MBTA station)|Alewife station on the [[MBTA Red Line in Cambridge, MA, U.S.]] A turnstile (also called a gateline, baffle gate, automated gate, turn gate in some regions) is a form of gate which allows one person to pass at a time. A turnstile can be configured to enforce one-way human traffic. In addition, a turnstile can restrict passage only to people who insert a coin, ticket, transit pass, security credential, or other method of payment or verification. Modern turnstiles can incorporate biometrics, including retina scanning, fingerprints, and other individ

residental community with controlled entrances and often a closed perimeter of walls/fences

restriction on accessing an online resource

, styled as OMRON, is a Japanese electronics company based in Kyoto, Japan. Omron was established by in 1933 (as the Tateisi Electric Manufacturing Company) and incorporated in 1948.

type of access control

measures to prevent crime at an airport

access control based on user roles

Type of access control

computer safety concept and one of the existing security models for design of secure computing systems

audiovisual communication device enabling visual identification of a visitor

The eXtensible Access Control Markup Language (XACML) is an XML-based standard markup language for specifying access control policies. The standard, published by OASIS, defines a declarative fine-grained, attribute-based access control policy language, an architecture, and a processing model describing how to evaluate access requests according to the rules defined in policies.

security control mechanism

electronic system fitted to motor vehicles to deter criminals from hijacking them

identity authentication method

access control paradigm where access is evaluated based on attributes related to the subject, the object, requested operations and in some cases environmental attributes