A computer can guess more than 100 billion passwords per second — still think yours is secure?

Passwords have been used for thousands of years as a means of identifying ourselves to others and in more recent times, to computers. It’s a simple concept – a shared piece of information kept secret between individuals and used to “prove” identity. Passwords in an IT context emerged in the 1960s with mainframe computers – large centrally operated computers with remote “terminals” for user access. They’re now used for everything from the PIN we enter at an ATM, to logging in to our computers and various websites. But why do we need to “prove” our identity to the systems we…

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