Mikko Hypponen: Three types of online attack
Did you know every laser printer prints an invisible pattern of yellow dots that uniquely identifies that printer? This is so authorities can hold you responsible for what you print. I am not joking.
This TED talk probably is not what you think. From whom, for instance, will these attacks come? How about criminals, corporations and governments, just for starters.
http://www.ted.com/talks/mikko_hypponen_three_types_of_online_attack.html
THIS TALK IS REQUIRED VIEWING FOR ALL SECURITY STUDENTS.