The principle of least privilege is a security approach that limits the access and privileges granted to users, devices, or other entities within an information system. It restricts any entity's ability to access resources needed to perform authorized functions while those needs exist, thereby preventing cybercriminals from exploiting compromised credentials to roam undetected across networks. The principle has been around for generations as a best practice but has become increasingly necessary due to the severity of today's cyber threats. Implementing least privilege can help block attempts to move laterally across a network, reduce the potential vectors cybercriminals can use to penetrate network defenses, and make compliance with regulations such as HIPAA and Sarbanes-Oxley much easier. Best practices for implementing least privilege include cleaning up privileges, creating a segmented architecture, ignoring the perimeter, granting ephemeral just-in-time credentials, and using activity logs to refine least privilege policies. Organizations can implement least privilege access without difficulty or expense by deploying Twingate's Zero Trust solution in as little as a quarter of an hour, which uses software-defined perimeters to protect on-premises and cloud resources without additional network infrastructure.