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Revision Date Username Comment
1317 Nov 2014 - 10:49ThomasMisa 
1217 Nov 2014 - 10:43ThomasMisa 
1122 Oct 2013 - 12:20ThomasMisa 
1003 Oct 2013 - 15:25norqu036? 
919 Jun 2013 - 14:44ThomasMisa 
804 Jun 2013 - 12:54NicLewis 
703 Jun 2013 - 21:56NicLewis 
603 Jun 2013 - 20:47NicLewis 
503 Jun 2013 - 12:49NicLewis 
403 Jun 2013 - 10:57NicLewis 
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Brewer-Nash (Chinese Wall) Model


The Brewer and Nash model, also called the "Chinese Wall" model, was proposed in 1989 by David Brewer and Michael Nash, drawing upon a concept derived from the legislation introduced after the crash of the stock market in 1929, which created communications barriers among divisions of financial institutions to avoid conflicts of interest. Using the Brewer-Nash model, an information flow model, objects are collected in a company dataset, with their security label determined by the company dataset together with a conflict of interest class. An subject may then access an object "only if that object is in the same company dataset as an object already access by the subject, or if the object belongs to an entirely different conflict of interest class."(1) This model is intended to avoid conflicts of interest, particularly within commercial organizations.(2)

In 1989, David Brewer and Michael Nash developed "The Chinese Wall Security Policy" partly in response to the Clark-Wilson model of computer security. In the financial sector, a "Chinese Wall" referred to a form of regulation that developed after the stock market crash of 1929. This form of regulation stipulated that analysts had to avoid conflicts of interests when offering financial services to clients that might be in competition with one another. (3)


Additional Resources:

  • lock brewer_nash_89.pdf: 1989 IEEE paper, "The Chinese Wall Security Policy," describing the Brewer-Nash (Chinese Wall) Model (Log-in required).


1 : Karl de Leeuw and Jan Bergstra, eds., The History of Information Security: A Comprehensive Handbook (New York: Elsevier, 2007), 630.

2 : http://en.wikipedia.org/wiki/Brewer_and_Nash_model

3 : lock David F. C. Brewer and Michael J. Nash, "The Chinese Wall Security Policy," _ Proceedings of the IEEE Symposium on Security and Privacy, 1989_, Oakland, CA: IEEE Press, May 1989, 206-214. (Log-in required)

4 : Dieter Gollman, "Security Models," 630-631, in Karl de Leeuw and Jan Bergstra, eds., The History of Information Security: A Comprehensive Handbook, (Oxford, UK: Elsevier, 2007), 595-621.

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Topic revision: r4 - 03 Jun 2013 - 10:57:33 - NicLewis
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