In the US, the Magnuson-Moss Warranty Act prevents manufacturers from voiding warranties solely due to tampering.
A warranty may be dishonored only if the tampering actually affected the part that has failed, and could have caused the failure.
Sometimes (especially in order to avoid litigation), manufacturers go further and use tamper-resistant screws, which cannot be unfastened with standard equipment.
Tamper-resistant screws are also used on electrical fittings in many public buildings primarily to reduce tampering or vandalism that may cause a danger to others.
Solutions may involve all phases of product production, packaging, distribution, logistics, sale, and use.
No single solution can be considered as "tamper-proof".
The process of making software robust against tampering attacks is referred to as "software anti-tamper".
Anti-tamper (AT) is required in all new military programs in the U. Tamper resistance finds application in smart cards, set-top boxes and other devices that use digital rights management (DRM).
Often multiple levels of security need to be addressed to reduce the risk of tampering.
Some considerations might include: Tamper means interfere with (something) without authority or so as to cause damage.
DRM mechanisms also use certificates and asymmetric key cryptography in many cases.
In all such cases, tamper resistance means not allowing the device user access to the valid device certificates or public-private keys of the device.