Good and bad keys
A good key is one that is ‘strong’, meaning it is difficultfor other people to guess. For example, ‘3As4*^zdWy:#8SmS)a’ is a strong key. Avoid using simple keys that consist of, for example, your name. These simple keys are known as ‘weak’ keys.
If the above options do not provide enough security for you, download Access manager for Windows.
Access manager provides much more security than standard ways in Windows.
More articles about Security