All Credit Card PIN Numbers in the World Leaked

There are 10,000 possible combinations that the digits 0-9 can be arranged to form a 4-digit pin code. Out of these ten thousand codes, which is the least commonly used? Which of these pin codes is the least predictable? Which…

Why Passwords Have Never Been Weaker—and Crackers Have Never Been Stronger

In late 2010, Sean Brooks received three e-mails over a span of 30 hours warning that his accounts on LinkedIn, Battle.net, and other popular websites were at risk. He was tempted to dismiss them as hoaxes—until he noticed they included…

Most used passwords

25 Most Used Passwords Revealed: Is Yours One Of Them?

After it was discovered that more than six million LinkedIn passwords had been leaked as well as many at Last.fm and eHarmony, no one has stopped talking about password and pass-code security. Here is a list of top 25 most…

Short Passwords ‘Hopelessly Inadequate

The availability of password-cracking tools based on increasingly powerful graphics processors means that even carefully chosen short passwords are liable to crack under a brute-force attack. A password of less than seven characters will soon be “hopelessly inadequate” even if…