1. What should be the basis of a very strong password? Length or Complexity? Should a password have a combination of 2 upper case and 2 lower case letters, 2 numbers, 2 punctuation marks and 2 mathematical symbols and unreadable? Well, there are readable passwords which are more difficult to crack than the most complex passwords,because of their entropy. Some examples of readable passwords are: (h0co1@te, $uN5h!nE, E1eMeN+@RY If these readable passwords which i set as examples are not strong enough, then anyone who has computer knowledge and can access the internet can freely put these passwords into test by using the online password strength meter. But he/she must be sure there are no hidden malwares in it. There are several efficient password managers, some of them are free, which are also efficient password generators. The most notable of them are KeePass, LastPass and PasswordBox.