Access control list

An access control list (ACL), is a list of permissions assigned to a site user. An ACL specifies which users processes are granted access to objects, as well as what operations are allowed on given users. Each entry in a typical ACL specifies a subject and an operation. For instance, if a file object has an ACL that contains (Alice: read,write; Bob: read), this would give Alice permission to read and write the file and Bob to only read it.