Least privilege and separation of duties stop that from happening. They are not optional. They are the base layers of a secure system. Least privilege limits every user, process, and service to the minimum level of access needed to do its job. Separation of duties divides critical tasks so no single person or system controls the full chain. Together, they close doors attackers look for.
Implementing least privilege starts with strict access controls. Map every role. Remove rights not essential for that role. Automate permission reviews on a set schedule so nothing drifts. Apply these rules to APIs, service accounts, containers, and CI/CD pipelines. Credentials should be scoped narrowly and rotated often.
Separation of duties means breaking up responsibilities that could be abused. No single account should be able to deploy code, approve changes, and move that code to production. Distribute these privileges across independent roles or automated checks. Use version control, signed commits, and enforced merges to make bypassing the process impossible without collusion.