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Obscure password requirements (feddit.org)

submitted 3 weeks ago by [email protected] to c/[email protected]

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What is your favourite password rule?

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[–] [email protected] 8 points 3 weeks ago (2 children)

at what point do password requirements start making password easier to crack?

[–] [email protected] 16 points 3 weeks ago

They already do. If I know a number is required, I don't have to try any passwords that don't have a number.

[–] [email protected] 3 points 3 weeks ago* (last edited 3 weeks ago)

They invariably do. They always constrain the list of things that a fully random generator could possibly make. They never add to that list.

Even rules like "can't use the same character twice in a row" constrain the list at least a little. That one makes it harder for dumb people to do dumb things, but also makes it harder for smart people to do smart things.