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Comment on Ask HN: What is the most exciting thing you have learnt this year till now?

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Mechanical keypad locks dont require you to input the code in a certain order. If the code is 0451 you can unlock it with 1054 or any other combination of those numbers. It's not exciting exciting, but it's oddly novel to show off.

Wow! That’s means a four-digit mechanical lock would only have 210 possible combinations. Seems pretty easy to brute-force.

You mean 1045 right?

You could have any combination of 0 1 4 5 and it'll work as long as you use the same numbers the same amount of times as the original sequence.

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