InformationWeek May 22, 2012 May 22, 2012,
Volume 171, Issue 4
"More often than not, our ATM PIN (usually a 4-digit decimal number) is either our own birth date or a family member's birth date or some important date in our lives like wedding anniversary or graduation day. The reason is plain and simple these dates are easy to remember. And then where can a pickpocket find these dates? ..."