A traffic-light policy is a simple control framework that uses color codes such as red, yellow, and green to show when a tool, action, or data type is prohibited, restricted, or allowed. In cyber security, this kind of policy turns abstract rules into clear operational guidance, which helps people make fast decisions without guessing. It is commonly used in acceptable-use rules, data classification, and tool approval workflows.
Its value is practical: clear labels reduce misuse, improve accountability, and limit accidental exposure of sensitive information. For example, a policy may forbid uploading confidential data to third-party AI services, allow limited use with public content, or permit a tool only inside managed systems. Defenders use this approach to reduce shadow IT and unsafe sharing, while attackers often benefit when rules are vague and users ignore risk. A traffic-light policy supports security by making permissions visible before action is taken.