Which security principle emphasizes the need to limit user access rights to the bare minimum?

The principle that emphasizes limiting user access rights to the bare minimum is known as least privilege. This concept is essential in cybersecurity, as it ensures that users only have the permissions necessary to perform their job functions. By restricting access rights, the risk of accidental or intentional misuse of privileged information is reduced. If a user account is compromised, adhering to the least privilege principle limits the potential damage, as the attacker would only gain access to the resources and capabilities associated with that account.

This principle is particularly important in managing sensitive information and critical systems, as it minimizes exposure and helps prevent unauthorized access. Implementing least privilege not only bolsters security but also enhances compliance with regulations that mandate strict control over data access.

Other options refer to different aspects of security. Defense in depth is a strategy that incorporates multiple layers of defense to protect information. Segmentation involves separating networks or systems to control access better and contain breaches. Confidentiality pertains to protecting information from unauthorized access but does not specifically address the principle of limiting access rights.