Repeated characters especially in short length, reduce security.
So let's say you have two capital Z's in a password, you're actually reducing your security.
If your password contains personal life information, like kids names or pet names.
It's less secure.
If you use the same password in more than 1 place.
It's NOT secure. You are putting your faith in those places to have protection on their end against attacks on their system. One house falls, all others will too.
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