a prueba de manipulación (adj)

unbefugt, gegen unbefugte Eingriffe gesichert (adj)

All fastening screws have been replaced with tamper-proof pin hex button head screws.

In contrast to mechanical systems, the encoded chip is extremely tamper-proof.

Tamper-proof fixtures, break-proof panels, noise-reducing enclosures and stable guards all help to boost active safety systems in production.