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TCPA: Building computing platforms upon a solid foundation of trust.
As businesses stake their very existence on the Internet, PCs, PDAs, and other key computing platforms, the trustworthiness of these platforms has become a vital concern. In response, the Trusted Computing Platform Alliance (TCPA) has delivered a complete specification for building trusted computing platforms atop trusted hardware. In Trusted Computing Platforms, leaders of the initiative illuminate TCPA for every systems developer and decision-maker. They place TCPA in context, outlining its goals, techniques, and powerful implications for the future.
Backed by an extraordinary range of industry leaders, TCPA offers the first complete, cost-effective, and globally applicable solution for trusted computing. Whether you develop new systems or apply them in business or government, you need to understand this technologyand with this book, you will.
(NOTE: Each chapter concludes with Summary.)
About the Authors.
I. INTRODUCING TRUSTED PLATFORM TECHNOLOGY.1. Trusted (Computing) Platforms: An Overview.
Summary of Trusted Platform Concepts. Why Are Trusted Platforms 'Trusted'? The Value of Trusted Platforms. The Main Features of Trusted Platforms. When All Platforms Are Trusted Platforms.2. Usage Scenarios.
Straightforward Application of TCPA Trusted Platforms. Speculative Use of Trusted Platforms.3. Key Components of Trusted Platform Technology.
Special Properties of Trusted Platforms. Roots of Trust. Trusted Platform Architectural Adaptations. Integrity. Identity. Protected Storage. Secure Boot and Authenticated Boot Processes.
II. TRUST MECHANISMS IN A TRUSTED PLATFORM.4. Access Control-Ownership, Enabling, and Authorization.
Enabling, Activating, and Owning a TPM. Cryptographic Authorization. Descriptions of TPM Capabilities.5. Platform Identification and Certification.
Platform Endorsement. Attestation for Platform Identity Mechanisms. Generating a Trusted Platform Module Identity. Signing with TPM Identities. TPM Capabilities.6. Integrity Recording, Reporting, and Secure Boot.
Platform Configuration Register (PCR). Data Integrity Registers. TPM Capabilities.7. Protected Storage.
Concept of Protected Storage. Functions of Protected Storage.8. Migration and Maintenance Mechanisms.
The Concepts of Migration and Maintenance. Migration. Maintenance. TPM Capabilities.9. Conventional Security Functions and Assorted Host Functions.
Conventional Security Services. Capabilities. Auditing the TPM.
III. TRUSTED PLATFORMS IN PRACTICE.10. Bringing a Trusted Platform to Life.
Building the Bases. Setting Up the Platform. Managing Authorization in the Key Hierarchy. On-Going Platform Support.11. Building Trust.
In TCPA We Trust. Trusting the Roots. Trusting the Platform.12. Challenging a Trusted Platform.
Communication with a Trusted Platform. Example.
IV. TRUSTED PLATFORMS FOR ORGANIZATIONS AND INDIVIDUALS.13. Corporate Deployment of Trusted Platforms.
Overall Architecture. Deployment.14. The Trusted Platform in Front of You.
Establishing Users' Trust in Their TPs. Trusted Signing. Multiple Smart Cards. Dedicated Trusted States.Appendix A: Brief History of TCPA.
Evolution of TCPA. About TCPA. Choice of Platform. Further Information.Appendix B: Trust Models and the E-Commerce Domain.
Social Models of Trust. Trust in E-Commerce. Benefits for a Company in Being Associated with Trust. Conclusions.Appendix C: Basic Cryptographic Primitives Used in the TCPA Specification.
Basic Security Services. Basic Cryptographic Primitives.Glossary.
February 2001 witnessed a major leap forward in the field of computer security with the publication of an innovative industry specification for "trusted platforms." This heralded a new era in significantly higher security for electronic commerce and electronic interaction than currently exists. What's the difference between a "platform" and a "trusted platform"? A platform is any computing device-a PC, server, mobile phone, or any appliance capable of computing and communicating electronically with other platforms. A Trusted Platform is one containing a hardware-based subsystem devoted to maintaining trust and security between machines. Throughout this book, we use italics for terms like this that we are using in a very specific way. This industry standard in trusted platforms is backed by a broad spectrum of companies including HP, Compaq, IBM, Microsoft, Intel, and many others. Together, they form (or make up) the Trusted Computing Platform Alliance (TCPA).
Major innovations in corporate security like this occur infrequently, but they are of great importance in affecting the development of the field for many years. In this book, we explain the new technology as simply as possible, why it has been developed, and how it will operate in the real world.
In particular, this book aims to complement the TCPA standards by providing a plain-language primer of the technical specifications, as well as setting them in context and explaining how the technology will be used, both in the short term and in the longer term. Our hope is that the reader will gain a broad understanding of TCPA technology from a team who helped write the complex technical specification documents without having to read these documents "cold." It serves both as an ideal introduction to trusted computing for the general reader and as a method of improving the "learning curve" for manufacturers and application developers wishing to implement trusted systems. The book has a different approach to other descriptions of Trusted Platforms, being much more detailed and broad in context than the TCPA white papers and design philosophy document, yet avoiding the deep technical details of the TCPA specification. It is intended to explain, clarify, and inspire rather than specify.
A lack of trust in electronic services is one of the major factors constraining the growth of e-commerce. The importance of secure interaction is widely appreciated, but many people are not up to date with the latest thinking and approaches. The radical new approach to trusted computing described here has the potential of liberating the sector and dictating the way electronic communication develops as the young century evolves.
The problem addressed by the TCPA is that in modern information society, computer resources are becoming increasingly global and open. As a result, computing platforms are playing not only the role of computing devices, but also of communicating (connected) devices. Both local users and remote communicators could benefit from enhanced trust and confidence when using or communicating with computer platforms. Existing security technologies, such as user authentication and access control, cryptographic co-processors, and operating systems with different security services, are helpful in general but not suitable on their own for establishing the trust and confidence required. Computing security is a race between methods for constructing and breaching secure interaction. The TCPA has proposed a quantum leap in security, based on a novel but essentially straightforward concept.
The TCPA has proposed a trusted computing platform solution based on tamper-resistant hardware physically located inside the platform. This tamper-resistant hardware provides the computer platform with a "root of trust," and it supports a new and important security feature, namely integrity challenge of the platform. The integrity challenge feature helps to build a chain of trust, which allows local and remote users to verify whether selected functions and resources of the computing platform have been installed and are operating in a way that satisfies them.
At the time of this writing (2002), the first steps have already been made toward manufacture of Trusted Platforms. Several manufacturers have announced TPM-chip products.
This book has been written to appeal to a wide audience. Different parts of the book are targeted to different types of readers and can be read in conjunction with the other parts or alone. There are four parts, each containing several chapters, as follows:
We have tried to make each part and each chapter self-contained, so you may find a certain amount of necessary repetition of information, for which we apologize.
The book was written by a team of authors working on the same research project. It was edited by Siani Pearson. We would like to acknowledge some of the specific contributions by individual authors: Boris Balacheff to Parts 2 and 3 and technical review, Liqun Chen to Parts 2 and 4 and the appendices, Siani Pearson to Parts 1 and 4 and the appendices, David Plaquin to Part 3 and the book's figures, and Graeme Proudler to Parts 1 and 2 and general review.