youdontknowme I would imagine that it would only take a fairly minor modification on belts that are fastened with a padlock.
i would at least consider it better than using a padlock so far
Philip if I had an envelope with the key in it I would try and learn some clandestine skills to open it without looking like it had been tampered with.
this is risky, but within the realm of possibility. i think the best thing is if only the key holder knows the combination and then sends it as a message or something similar.
i don't have much confidence in technology. a pure combination lock would be mechanical, which is much more trustworthy in my opinion.