What would prevent a website from not allowing special characters when you create a password and require only alphanumeric?
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A long time ago some developers didn’t know how to properly save these special characters to a database. So companies started putting these idiotic policies in place instead of teaching their devs how to program.
We had huge problems from lots of code that improperly handled them and it has taken a lot of effort to fix that.
As far as today – there is no valid reason for the policies to stick around.
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