Yesterday I found a fascinating gate along my hiking trail: simple mechanical engineering that mimics advanced #cryptography.

Let's say 4 different officers want to share the ability to unlock this gate independently, but they don't want to use a shared key for some security reasons. For example, they might want to quickly disable or replace one of the 4 keys in case its owner gets fired or leaks it.

How can they achieve this using common padlocks and iron moving parts?

@kaia Don't you need to open all 4 locks to open this one?

@kaia Oh, I see... removing one peg creates enough slack to slide the latch out of its keeper...


@codewiz @kaia It could be possible to create a design inspired from this one that would require removing N locks out of X to allow a latch to slide.

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