A picture of a door bolt with a lock on it. The lock has an arrow pointing towards it, with some hex. The screws holding the bolt to the wall have an arrow with the singular number "4" on them.
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[–] 2 points 6 hours ago (2 children)

How much smaller does the key space become if you leave out all the “obvious” numbers?

How far from the edges of they key space do we need to go before it’s considered safe?

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