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?

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@codewiz They make a linked list of padlocks, of course.

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@aspensmonster Ah! That's how you get locked data structures! 😂

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