द्वौ परिघौ ॥ कZ_०२.३.२५ ॥
dvau parighau
ಎರಡು ಪರಿಘಗಳು (ಲಾಕ್-ಬಾರ್/ಬೋಲ್ಟ್ಗಳು) ಇರಬೇಕು।
Redundancy increases resistance to forced entry and reduces the probability of single-point security failure.