About the AuthorPhillip J. Windley is an Associate Professor of Computer Science at Brigham Young University. Dr. Windley is a nationally recognized expert in using information technology to add value to business. Windley received his PhD in computer science from the University of California, Davis in 1990. Prior to his graduate studies, Windley worked for four years as a nuclear metallurgist and a member of the technical staff at the Department of Energy's Division of Naval Reactors.ColophonOur look is the result of reader comments, our own experimentation, and feedback from distribution channels. Distinctive covers complement our distinctive approach to technical topics, breathing personality and life into potentially dry subjects.The cover of Digital Identity shows female masqueraders. A masquerade ball is a social gathering of participants who wear elaborate costumes to hide their true identities.Such gatherings originally gained popularity as elaborate allegorical pageants, celebrating marriages and other dynastic events of late medieval court life. In Italy, during the 15th century, masquerade balls were extended into costumed public festivities held for members of the upper classes.Masquerade balls are still held today, although they are less formal. "Costume parties" may very well be a descendant of this popular tradition.Sarah Sherman was the production editor and proofreader for Digital Identity. Linley Dolby was the copyeditor. Adam Witwer and Claire Cloutier provided quality control. Lydia Onofrei provided production assistance. Johnna VanHoose Dinse wrote the index.Ellie Volckhausen designed the cover of this book, based on a series design by Edie Freedman. The cover image is a 19th-century engraving from the Dover Pictorial Archive. Karen Montgomery produced the cover layout with Adobe InDesign CS using Adobe's ITC Garamond font.David Futato designed the interior layout. This book was converted by Joe Wizda to FrameMaker 5.5.6 with a format conversion tool created by Erik Ray, Jason McIntosh, Neil Walls, and Mike Sierra that uses Perl and XML technologies. The text font is Linotype Birka; the heading font is Adobe Myriad Condensed; and the code font is LucasFont's TheSans Mono Condensed. The illustrations that appear in the book were produced by Robert Romano, Jessamyn Read, and Lesley Borash using Macromedia FreeHand MX and Adobe Photoshop CS. This colophon was written by Sarah Sherman.The production editors for Book Title, eMatter Edition were Ellie Cutler and Jeff Liggett. Linda Walsh was the product manager. Kathleen Wilson provided design support. Lenny Muellner, Mike Sierra, Erik Ray, and Benn Salter provided technical support. This eMatter Edition was produced with FrameMaker 5.5.6.