Number of possibility for a password with the length n and k is the possible number of character :
![](http://img15.hostingpics.net/pics/600298Image1.jpg)
So I think that n1ckl3b4ck is not so secure
![Cheesy :D](http://ez.feedthetrolls.net/Smileys/default/cheesy.gif)
Try password like passphrases type :
alula undress hiccup maison sorry dedicate gombroon shoal kingfish
And you can add some special caracter :
alula!undress#hiccup;Maisonsorry dedicate.gombroon,sh0alkingfish
But don't do thing that are derived from nickelback it can be guessable
![Wink ;)](http://ez.feedthetrolls.net/Smileys/default/wink.gif)
Only use random caracter or passphrase with random words choose on different dictionnaries.