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About the Authors

Scott B. Guthery leads the cryptographic device project at CertCo. He holds a Ph.D. in probability and statistics from Michigan State University and worked for Bell Laboratories and Schlumberger before joining CertCo. He holds two patents for his work on Schlumberger’s well logging system and led the team that invented and developed the Java Card smart card. He has published articles in number theory, programming languages, real-time systems, and network protocols.

Timothy M. Jurgensen is a senior member of the technical staff at Schlumberger’s Austin Products Center. He holds a Ph.D. in nuclear physics from Rice University. He has been with Schlumberger for more than 25 years, involved in development activities for wide area computer networks deployed to support Schlumberger’s Oilfield Services business segment. He has been particularly active in the development of small aperture (VSAT) satellite-based communication systems and in the provision of high-security computer networks. He has published articles regarding wide area computer networks, satellite-based communication systems, data management, and network security infrastructures.

Trademark Acknowledgments

All terms mentioned in this book that are known to be trademarks or service marks have been appropriately capitalized. Macmillan Technical Publishing cannot attest to the accuracy of this information. Use of a term in this book should not be regarded as affecting the validity of any trademark or service mark.

Solo, Cyberflex, Multiflex, and Payflex are trademarks of Schlumberger. Java and Java Card are trademarks of Sun Microsystems. Windows, Windows 95, and Windows NT are trademarks of Microsoft Corporation. EZ Formatter, EZ Formatter Trial, and EZ Component are trademarks of Strategic Analysis, Inc. SnareWorks is a trademark of Intellisoft Corp. Visa Cash is a trademark of Visa. AAdvantage is a trademark of American Airlines.

Acknowledgments

The authors would like to thank Maria Nekam for her help with the design of the book’s cover and smart card. Ms. Nekam brought a healthy dose of ingenuity and enthusiasm to the various graphic designs related to the book.

The authors would also like to thank Henry Tumblin, who did an outstanding technical review on the book. Henry was a faithful and demanding representative of you, the reader. The book benefited greatly from his attentions.

The authors would like to acknowledge the generous support of Schlumberger during the development of this book. The members of the Austin Smart Card Team have been extremely helpful with their suggestions, review, and general support. Special thanks go to Danita Moseles, Ksheerabdhi Krishna, Neville Pattinson, Bertrand du Castel, Ed Dolph, Marc Valderrama, Pam Saegert, and Mike Montgomery for their active support. The encouragement and support of the entire Smart Cards and Systems group at Schlumberger is most appreciated as well.

Any errors that remain—particularly the ones that may seem to jump off the page at you when the book is opened at random—are entirely the responsibility of the authors. Your efforts to call these to our attention via email will be greatly appreciated. Any opinions expressed in the book are those of one or both of the authors and do not necessarily reflect the opinions of Schlumberger.

Dedications

Scott B. Guthery—to M.J.K.

Timothy M. Jurgensen—to Becky, Sarah, and Miriam.


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