Personally I use an amalgam of my age, the year, my phone number, my sister's name (she has 5) and the postcode for my last abode.
Amichai Shulman is the chief technology officer at Imperva, which makes software for thwarting hackers. Recently, he undertook a study of 32 million passwords stolen by an unknown hacker from Rockyou!, an online service that makes widgets for social networking sites like Facebook.
The list is depressing testimony to our collective lack of creativity in the arena of personal security.
“I guess it’s just a flaw in human genetics,” Shulman told the New York Times.
Most people aren't so 'cautious' and use some very obvious passwords. Here are the top 20 in order of popularity: