1. GB/T20984-2007, Information security technology information security risk assessment standard.
2. National security standard BMB17-2006, Involved graded protection technical requirements of state secrets information system.
3. National security standard BMB20-2007, Involved in management of standard classification protection of state secrets information system.
4. Di Tang, Ying Wei: submitted to Information security and technology (2012) In Chinese.
5. Jianfeng Wang: submitted to Network & Computer Security (2006) In Chinese.