How Do I Make Password And Username Restriction?

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how do i make password and username restricted for other users?

Posted 29-Apr-14 0:52am

master-k67

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Tom Marvolo Riddle 29-Apr-14 7:01am

Sorry.Not at all clear.Explain bit more

RahulMGunjal 29-Apr-14 7:06am

Need some more details!

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OriginalGriff · Answer 1 · 2014-04-29T01:06:00

First off, you don't want to restrict passwords from being the same as other users because that gives information away about the content of other users passwords: that there is at least one user that is using that password. And that is a nice big security hole, right there.

Secondly, it shouldn't be possible to check passwords, because you should be storing them hashed rather than as text - text passwords are a massive security problem - and the hash of two identical passwords from two different users shouldn't be the same anyway!

By all means check usernames: that's trivial! Just look in the database to see if a user with that name exists already before you allow the new user to create an identity on your system.