Anti-Tamper (AT) encompasses the systems engineering activities intended to prevent and/or delay exploitation of Critical Program Information (CPI) in US weapons systems. These activities involve the entire life cycle of systems acquisition, including research, design, development, implementation and testing of AT measures. Properly employed, AT adds significant longevity to CPI by deterring efforts to reverse-engineer, exploit, or develop countermeasures against a system or system component.

Anti-Tamper Approaches

Deter - Initial effort to discourage potential exploitation

Impede - Steps taken to delay exploitation

Detect - Identification of a tamper event

Respond - An action or a penalty taken upon a detection event