FIRST ANCHOR BOOKS EDITION, SEPTEMBER 2000

Copyright © 1999 by Simon Singh

All rights reserved under International and Pan-American Copyright Conventions. Published in the United States by Anchor Books, a division of Random House, Inc., New York, and simultaneously in Canada by Random House of Canada Limited, Toronto. Originally published in hardcover in the United States by Doubleday, a division of Random House, Inc., New York, and in the United Kingdom by the Fourth Estate, London, in 1999.

Anchor Books and colophon are registered trademarks of Random House, Inc.

The Library of Congress has cataloged the Doubleday edition as follows:
Singh, Simon.
The code book : the evolution of secrecy from Mary Queen of Scots to quantum cryptography / Simon Singh. –1st ed.
p. cm.
1. Cryptography–History.   2. Data encryption (Computer science)–History.   I. Title.
Z103.S56    1999
652′.8′09–dc21          99-35261

eISBN: 978-0-307-78784-2

Author photo © Nigel Spalding

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