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In computer security, an access-control list (ACL) is a list of permissions [a] associated with a system resource (object or facility). An ACL specifies which users or system processes are granted access to resources, as well as what operations are allowed on given resources. [1] Each entry in a typical ACL specifies a subject and an operation.
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In Microsoft Windows, cacls, and its replacement icacls, are native command-line utilities that can display and modify the security descriptors on files and folders. [1] [2] An access-control list is a list of permissions for securable object, such as a file or folder, that controls who can access it.
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.
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.
Permission code: Each access control entry (ACE) specifies its permission with binary code. There are 14 codes (12 in older systems.) Meaning: Each permission code has a meaning, depending on whether it is applied to a file or a folder. For example, code 0x01 on a file indicates the permission to read the file, while on a folder indicates the ...
A VLAN access control list (VACL) provides access control for all packets that are bridged within a VLAN or that are routed into or out of a VLAN. Unlike regular Cisco IOS access control lists that are configured on router interfaces and applied on routed packets only, VACLs apply to all packets.
An access control expression with respect to a computer file system is a list of Boolean expressions attached to a file object.An access control expression specifies a Boolean formula that defines which users or system processes are granted access to objects, as well as what operations are allowed on given objects.