1. Kaminsky, Dan.; Patterson, Meredith L.; and Sassaman, L. “PKI Layer Cake: New Collision Attack Against the Global X. 509 Infrastructure.” http://www.cosic.esat.kuleuven.be/publications/article-1432.pdf.
2. Stolen Digital Certificates Becoming Standard Malware Components;Fisher,2010
3. Report of the Defense Science Board Task Force on High Performance Microchip Supply;Board,2005
4. Proof-that Military Chips from China are Infected?;Reed,2012
5. UK Researchers Discover Backdoor in American Military Chip;Lim,2012