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"Thorough and comprehensive coverage from one of the foremost experts in browser security.ö
-Tavis Ormandy, Google Inc.

Modern web applications are built on a tangle of technologies that have been developed over time and then haphazardly pieced together. Every piece of the web application stack, from HTTP requests to browser-side scripts, comes with important yet subtle security consequences. To keep users safe, it is essential for developers to confidently navigate this landscape.

In The Tangled Web, Michal Zalewski, one of the world's top browser security experts, offers a compelling narrative that explains exactly how browsers work and why they're fundamentally insecure. Rather than dispense simplistic advice on vulnerabilities, Zalewski examines the entire browser security model, revealing weak points and providing crucial information for shoring up web application security. You'll learn how to:


Perform common but surprisingly complex tasks such as URL parsing and HTML sanitization
Use modern security features like Strict Transport Security, Content Security Policy, and Cross-Origin Resource Sharing
Leverage many variants of the same-origin policy to safely compartmentalize complex web applications and protect user credentials in case of XSS bugs
Build mashups and embed gadgets without getting stung by the tricky frame navigation policy
Embed or host user-supplied content without running into the trap of content sniffing

For quick reference, "Security Engineering Cheat Sheetsö at the end of each chapter offer ready solutions to problems you're most likely to encounter. With coverage extending as far as planned HTML5 features, The Tangled Web will help you create secure web applications that stand the test of time.


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About the Author
Michal Zalewski is an internationally recognized information security expert with a long track record of delivering cutting-edge research. He is credited with discovering hundreds of notable security vulnerabilities and frequently appears on lists of the most influential security experts. He is the author of Silence on the Wire (No Starch Press), Google´s ´Browser Security Handbook,´ and numerous important research papers.


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Table of Contents
Preface and Acknowledgments

1. Security in the World of Web Applications

Part I: Anatomy of the Web
2. It Starts with A URL
3. Hypertext Transfer Protocol
4. Hypertext Markup Language
5. Cascading Style Sheets
6. Browser-Side Scripts
7. Non-HTML Document Types
8. Content Rendering with Browser Plug-Ins

Part II: Browser Security Features
9. Content Isolation Logic
10. Origin Inheritance
11. Life Outside Same-Origin Rules
12. Other Security Boundaries
13. Content Recognition Mechanisms
14. Dealing with Rogue Scripts
15. Extrinsic Site Privileges

Part III: A Glimpse of Things to Come
16. New and Upcoming Security Features
17. Other Browser Mechanisms of Note
18. Common Web Vulnerabilities

Epilogue
Notes
Index

View the detailed Table of Contents (PDF)

View the Index (PDF)

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Reviews
´Thorough and comprehensive coverage from one of the foremost experts in browser security.´
-Tavis Ormandy, Google Inc.

´For anyone involved in programming web pages, The Tangled Web should be considered required reading.´
-Ben Rothke, Slashdot (Read More)

´A must-read for anyone who values their security and privacy online.´
-Collin Jackson, Researcher at the Carnegie Mellon Web Security Group

´Perhaps the most thorough and insightful treatise on the state of security for web-driven technologies to date. A must have!´
-Mark Dowd, Azimuth Security, Author of The Art of Software Security Assessment

´The best book out there on web security right now.´
-Dave Aitel, Dailydave (Read More)

´A must read for any web developer, anyone that wonders why the Blue Coat proxy system chucks out such strange packets, and anyone that really wants to understand how the web works from a security perspective.´
-Stephen Northcutt, SANS.edu (Read More)

´The Tangled Web captures a lot of nuances between CSS and JavaScript implementations. Each chapter concludes with a great cheat sheet. Overall, I enjoyed the book. If you test or build web apps then you will too.´
-Chris Rohlf, Matasano Security, EM_386 (Read More)

´A fascinating, enlightening and enjoyable read.´
-Global Nerdy (Read More)

´While I thought that I knew all about a lot of the areas that this book covers, in just about every section the author went beyond what I knew to discuss aspects of the technology that I had never considered.´
-Stephen Chapman, Felgall.com (Read More)

´If you´re a developer, tester, or infrastructure implementer, you would be wise to read and then re-read The Tangled Web.´
-Michael Larsen, TESTHEAD (Read More)

´Perhaps one the most valuable parts of The Tangled Web is how Zalewski adds a handy ´Security Engineering Cheat Sheet´ to the end of each chapter. Having these quick tips at ones fingertips is a remarkable asset and great addition to the book.´
-Cory Gackenheimer, cgack.com (Read More)

´Provides an invaluable reference for anyone working with, testing or deploying web applications.´
-Bites of Apple (Read More)

´Michal Zalewski has a colorful writing style. His book is serious and loaded with technical detail, but that doesn´t stop him from turning a nice phrase here and there.´
-John D. Cook, The Endeavor (Read More)

´Fun to read, educational and (if you are actually creating websites) very useful.´
-Tony Lawrence, A.P. Lawrence (Read More)

´This is a must read for anyone who wants to engage web client security on a professional level.´
-Gynvael ´GynDream´ Coldwind, gynvael.coldwind.pl/ (Read More)

´Zalewski´s book puts a bright, uncomfortable spotlight on the fundamental insecurities of Web browsers, but it also shows you how to improve the security of Web applications.´
-Books, Books & More (New) Books (Read More)