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I one of companies I worked for, we had user that somehow managed to put tab character in his password. Then we got bug report that he can't enter his password. So, limiting character set doesn't have to be always bad idea.
– el.pescado - нет войне
Commented Jan 27, 2016 at 18:23
@el.pescado How do you put tabs in passwords? It just puts you on the next field on the site or browser or doesn't it? Or did they type \t? If so then the password wasn't sanitised before.
– iProgram
Commented Jan 27, 2016 at 22:37
5

If you're copy-pasting the password from, say, a text document and include the tab there, it can totally be used in a password field.
– Félix Saparelli
Commented Jan 28, 2016 at 10:29
In some contexts, you can press CTRL-I to input a tab character. Notably, however, this doesn't happen in IE (I believe it tries to create a bookmark to the current page, there).
– Dan Henderson
Commented Jan 31, 2016 at 6:28

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