Скачать или смотреть Access control matrix

An access control matrix is a security model used in computer systems and networks to define and control access rights for different entities such as users, processes, or resources. It provides a systematic way of specifying the permissions that are associated with each entity in the system. The matrix typically represents the relationship between subjects (users or processes) and objects (resources or data) in the system, showing which subjects have which types of access rights to which objects.
In this example:

User 1 has read access to Object 1, write access to Object 2, and no access to Object 3.
User 2 has read access to Object 2, execute access to Object 3, and no access to Object 1.
User 3 has read access to Object 1, write access to Object 3, and no access to Object 2.
Access control matrices can be implemented and managed using various techniques and systems, such as access control lists (ACLs), capabilities, role-based access control (RBAC), and other access control mechanisms. These matrices are fundamental in ensuring the security and integrity of computer systems by enforcing the principle of least privilege, where users are granted only the minimum level of access required to perform their tasks.

The matrix is usually represented as a table where rows correspond to subjects and columns correspond to objects. The entries in the matrix indicate the access rights that each subject has to each object. Common access rights include read, write, execute, delete, and others, depending on the specific requirements of the system.

Here's a simple example of an access control matrix: