This is the online full text version of Designing Secure Software by Loren Kohnfelder (all rights reserved).
Providing this free online version is the best way to share the ideas in the book as widely as possible. Please understand that this version is hand built and includes the author’s rough diagrams rather than the versions in the book done by a graphic artist,precedes final proofreading edits, and generally lacks the many other details that gives the published version additional quality and finish.
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