Features incorporated into a device (or procedures associated with its use) intended to make tampering more difficult or reduce the probability that tampering could take place without detectable tamper indications. IAEA C/S equipment is designed to have a high degree of tamper resistance. It is installed in sealable tamper indicating enclosures. The enclosure surfaces are coated with a tamper indicating material (e.g. anodized aluminium), the hinges are not accessible when the enclosure is closed, and the cable and ventilation entries are protected against probes or other unauthorized tool insertion.