How Secure Is My Password
http://howsecureismypassword.net/
Strength Test
http://rumkin.com/tools/password/passchk.php
Microsoft Safety And Security Center
https://www.microsoft.com/security/pc-security/password-checker.aspx
How Big Is Your Haystack
https://www.grc.com/haystack.htm
以下几个网站的效果不是很理想,因为abc-123或者123!@#qwe这样的密码,他们也认为是强度很高的密码,有一定的误导性。
The Password Meter
http://www.passwordmeter.com/
Test Your Password
http://www.testyourpassword.com/
Yet Another Password Meter
http://www.yetanotherpasswordmeter.com/
