According to Steve King of CyberEdio, a 12 character password consisting only of numbers can be hacked within 25 seconds.
If the password consists of lower case letters, it takes three weeks to hack.
A combination of upper and lower case letters extends hacking time to 300 years.
Combine letters, numbers and symbols in a password and it will take 34,000 years to hack.
So why are you still using 123456 as your password?