Endpoint Protection

I found another good resource to to check how is safe or weak a password.  In the example below, I tested an easy password  : " password  " and The Password Checker (  Strength Test - http://rumkin.com/tools/password/passchk.php ) gives an estimation about how strong is this password in terms of strenght, entropy and charset size.

• Warnings are shown if you enter a common password.
• Warnings are shown if your password is very short (4 or less characters) or if it is short (less than 8 characters)
• Password strength is determined with this chart, which might be a bit of a stretch for a non-critical password:

          < 28 bits = Very Weak; might keep out family members
             28 - 35 bits = Weak; should keep out most people, often good for desktop login passwords
            36 - 59 bits = Reasonable; fairly secure passwords for network and company passwords
            60 - 127 bits = Strong; can be good for guarding financial information
           128+ bits = Very Strong; often overkill

• The number of bits listed for entropy is an estimate based on letter pair combinations in the English language. To make the frequency tables a   reasonable size, I have lumped all non-alphabetic characters together into the same group. Because of this, your entropy score will be lower than your real score when you use several symbols.
• For determining the character set, letters are grouped into a-z, A-Z, numbers, symbols above numbers, other symbols, and other characters. If your passphrase contains a character from the subset, that subset is added to the pool, increasing the size of the character set and increasing the amount of entropy in your password.

Link : Strength Test


About password testing , read also : Test your password : How Secure Is My Password , Test your password : Microsoft password checker, Test your password : The Password Meter