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In computer security, general access control includes identification, authorization, authentication, access approval, and audit.A more narrow definition of access control would cover only access approval, whereby the system makes a decision to grant or reject an access request from an already authenticated subject, based on what the subject is authorized to access.
Access control door wiring when using intelligent readers and IO module. The most common security risk of intrusion through an access control system is by simply following a legitimate user through a door, and this is referred to as tailgating. Often the legitimate user will hold the door for the intruder.
The primary purpose of user groups is to simplify access control to computer systems. For instance, a computer science department has a network which is shared by students and academics . The department has made a list of directories which the students are permitted to access and another list of directories which the staff are permitted to access.
CRS—Computer Reservations System; CRT—Cathode-ray tube; CRUD—Create, read, update and delete; CS—Cable Select; CS—Computer Science; CSE—Computer science and engineering; CSI—Common System Interface; CSM—Compatibility support module; CSMA/CD—Carrier-sense multiple access with collision detection; CSP—Cloud service provider
In computer security, lattice-based access control (LBAC) is a complex access control model based on the interaction between any combination of objects (such as resources, computers, and applications) and subjects (such as individuals, groups or organizations).
A typical IP access controller supports 2 or 4 basic access control readers. IP access controllers may have an internal web server that is configurable using a browser or using software installed on a host PC. The main features that distinguish IP controllers from older generations of serial controllers are:
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In the case of the hotel room lock, there is no central system; the keycard and the lock function in the same tradition as a standard key and lock. However, if the card readers communicate with a central system, it is the system that unlocks the door, not the card reader alone. [3]