Post Syndicated from David original http://devilsadvocatesecurity.blogspot.com/2010/05/experiments-in-security-magstripe.html

Tetherdcow via BoingBoing has a great science experiment to try with magstripes on credit cards and other ID cards: using rust particles to read the magstripe. This looks like a great hands on and visible way to talk about how data is encoded when teaching students.