A seemingly good question I ran into was "Enter the last 5 digits of your driver's license." I always have my driver's license with me, which sounds good. The

A seemingly good question I ran into was "Enter the last 5 digits of your driver's license." I always have my driver's license with me, which sounds good. The problem is NJ driver's license numbers are actually encoding of your data. The last 5 digits are your birth month and year (MMYY) plus a digit that maps to your sex (0 or 1 for a female, 5 or 6 for a male). My Facebook profile contains the answer to the security question.