Tamperproof (adjective)

Designed or made to prevent unauthorized interference or alteration.

Origin:

Late 19th century: from tamp (in the sense "alter, modify") + proof.

Examples:

1. The voting machines were designed to be tamperproof to ensure a fair election.
2. The medicine bottle was tamperproof to prevent children from accidentally consuming it.
3. The security system was tamperproof to prevent unauthorized access.
4. The software was designed to be tamperproof to prevent hacking.
5. The financial records were kept in a tamperproof environment to prevent fraud.