1. Anderson R, Kuhn M. Tamper resistance – a cautionary note. In: Proceedings of the second USENIX workshop of electronic commerce; 1996, pp. 1–11.
2. APACS. 22 million UK consumers use cards to buy online in 2004; 08/09/05. http://www.apacs.org.uk/media_centre/press/05_09_08.html.
3. The sorcerer's apprentice guide to fault attacks;Bar-El;Proc IEEE,2006
4. BBC Two “Newsnight”, Segment on vulnerabilities in Chip and PIN “PIN entry devices” (PEDs), http://video.google.com/videoplay?docid=7109740591622124830, 2/2008.