A Tamper-Resistant Security Module
is a device that encorporates physical protections to prevent compromise of Cryptographic Security Parameters (CSP) therein contained.
There are varying levels of protection afforded by TRSMs:
- Tamper-resistance: make intrusion difficult, usually by employing hardened casing
- Tamper-evident: make intrusion attempts evident to subsequent viewers, often by employing seals which much be broken during intrusion
- Tamper-responsive: detect the intrusion attempt and destroy the contents in the process
A TRSM is usually also a HSM.