Tamper Evidence

Tamper evidence refers to the design features of a system or physical container that make it obvious if unauthorized access has been attempted. In hardware security, this includes specialized seals, sensors, or chassis designs that change state or show physical damage if breached.

This concept is vital for protecting hardware security modules and air-gapped devices. It provides an early warning system that allows administrators to invalidate keys before they are misused.

Tamper-evident mechanisms are a deterrent against physical attacks, as the perpetrator knows their actions will be detected. These features are often combined with tamper-response mechanisms, which might include erasing the sensitive data inside the device upon detection.

This dual approach of detection and response is crucial for high-security environments. It creates a verifiable audit trail for physical security incidents.

It ensures that any attempt to compromise the device leaves a permanent, undeniable trace.