(also ACE)
Access control entries (ACEs) refer to information in an access control list that describes the access permissions of a single user or a group of users. Each access control entry has an ID that identifies the individual or subject group. Access control lists are ordered lists containing many access control entries that define the access rights of different individuals or groups.
Each access control entry contains the following:
Access control entries are important for the overall security of a given system. They manage all access to the object in question (whether it’s a platform, a program, or software). ACEs define who can access the object and at what level.