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Trike v1 Methodology Document [Draft]
Eddington, Michael, Brenda Larcom, and Eleanor Saitta.
2005/07/20.

Trike is a unified conceptual framework for security auditing from a risk management perspective through the generation of threat models in a reliable, repeatable manner. A security auditing team can use it to completely and accurately describe the security characteristics of a system from its high-level architecture to its low-level implementation details. Trike also enables communication among security team members and between security teams and other stakeholders by providing a consistent conceptual framework. This document describes the current version of the methodology (currently under heavy development) in sufficient detail to allow its use. In addition to detail on the threat model itself (including automatic threat generation and attack graphs), we cover the two models used in its generation, namely the requirements model and the implementation model, along with notes on risk analysis and work flows. The final version of this paper will include a fully worked example for the entire process. Trike is distinguished from other threat modeling methodologies by the high levels of automation possible within the system, the defensive perspective of the system, and the degree of formalism present in the methodology. Portions of this methodology are currently experimental; as they have not been fully tested against real systems, care should be exercised when using them.

The methodology described in this document is copyright 2003-2005 Eleanor Saitta, Brenda Larcom, and Michael Eddington, excluding those covered under other copyrights, and the whole may be used under the MIT license, .software. being replaced with .methodology. throughout. This document is published under the Creative Commons attribution-noncommercial-sharealike 2.0 license.

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News

31 Jul 2012
Brenda Larcom will be presenting a half-day tutorial on using the current Trike spreadsheet to write security objectives at IEEE RE 2012, September 25 in Chicago, IL.

1 Jul 2012
First official spreadsheet release, 1.5.06.

1 Jul 2012
New SVN and web site organization to support parallel development of the standalone and spreadsheet tools.

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Copyright 2004-2008 Brenda Larcom, Eleanor Saitta, and Stephanie Smith. Copyright 2009-2012 Brenda Larcom and Eleanor Saitta. All rights reserved.