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access control

Access control is a security service used to protect data processing systems against unauthorized users. It involves organizational and technical precautions that ensure that only authorized persons can access a system, a service or specific data

. The possibilities of un

authorized access toprograms and data are limited as far as possible by authorizing

andassigning access rights. Control is typically achieved through passwords, personal identification numbers (PINs), biometric data, electronic keys

, granting privileges, or providing attributes.This security function can be used in the directory system of an access control

system todetermine whether a user who has authenticated himself to the directory

also has the usage authorization that shows whether the person has access to the corresponding directory and what he is allowed to do with this data. For verification purposes, there are the access control lists

(ACL) in which theuser names and access rights


The access control can refer to directories, computers, other resources and transmission media that can be accessed by means of access procedures. The way in which access to data and resources is provided has different approaches. For example, in Mandatory Access Control (MAC) access is mandatory, in Discretionary Access Control (DAC) access is free, in Role-Based Access Control (RBAC) access is role-based, and in Attribute-Based Access Control (ABAC) access is attribute-based.

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Englisch: access control
Updated at: 13.05.2019
#Words: 241
Translations: DE