Access Control List (ACL)

Definition - What does Access Control List (ACL) mean?

Access control list (ACL) refers to the permissions attached to an object that specify which users are granted access to that object and the operations it is allowed to perform.

Each entry in an access control list specifies the subject and an associated operation that is permitted.

Techopedia explains Access Control List (ACL)

File system ACL is a data structure that holds entries that specify individual user or group rights to system objects such as processes, files and programs. These entries are referred to as access control entities. Each system object is associated with a security attribute that identifies its access control list.

The ACL has an entry for each system user that defines the user's privileges, such as reading a file, writing to a file or executing a file. The operating systems that use ACL include Novell’s Netware, Microsoft Windows NT/2000, Digital's OpenVMS and UNIX-based systems.

When a subject requests an object in an ACL-based security model, the OS initially checks the ACL for an applicable entry to decide whether the requested operation is authorized. The ACL model is applicable to both individual entities and the collection of objects within the system hierarchy.

Share this:

Connect with us

Email Newsletter

Join thousands of others with our weekly newsletter

The 4th Era of IT Infrastructure: Superconverged Systems
The 4th Era of IT Infrastructure: Superconverged Systems:
Learn the benefits and limitations of the 3 generations of IT infrastructure – siloed, converged and hyperconverged – and discover how the 4th...
Approaches and Benefits of Network Virtualization
Approaches and Benefits of Network Virtualization:
Businesses today aspire to achieve a software-defined datacenter (SDDC) to enhance business agility and reduce operational complexity. However, the...
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.