What method of access control should be used in an access control list where only authorized users can access resources?

The method of access control that emphasizes allowing only authorized users access to resources is one that utilizes explicit allow and implicit deny. This approach ensures that access rights are clearly defined for each user or group, granting permissions explicitly. When an explicit allow rule is applied, it specifically states that certain users or groups have the right to access the resource.

In conjunction with this, the implicit deny means that anything not explicitly allowed is denied access by default. This is a fundamental principle in security that helps to prevent unauthorized access. By establishing clear permission sets, and denying anything that does not meet these criteria, the system becomes more secure and minimizes the risk of unintentional access by unauthorized users.

This model contrasts with other combinations that may either allow broader access (which increases security risks) or fail to clearly define access rights (leading to potential vulnerabilities). Thus, using explicit allows in combination with an implicit deny provides a robust framework for effective access control.