1. US Congress, USA PATRIOT Act of 2001, Public Law 107-56, Washington, DC, 2001.
2. G. Bush, Homeland Security Presidential Directive 7, The White House, Washington, DC (www.dhs.gov/xabout/laws/gc_1214597989952.shtm#1), 2003.
3. K. Zetter, How digital detectives deciphered Stuxnet, the most menacing malware in history, Wired, July 11, 2011.
4. OSI Reference Model–The ISO model of architecture for open systems interconnection;Zimmermann;IEEE Transactions on Communications,1980
5. Intrinsic physical-layer authentication of integrated circuits;Cobb;IEEE Transactions on Information Forensics and Security,2012