Digital Fortress

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Digital Fortress is a novel by American author Dan Brown and published in 1998 by St. Martin's Press (ISBN 0-312-26312-0) Susan Fletcher, a brilliant mathematician and head of the National Security Agency's cryptography division, finds herself faced with an unbreakable code resistant to brute-force attacks by the NSA's 3 million processor supercomputer. The code is written by Japanese cryptographer Ensei Tankado, a sacked employee of the NSA, who is displeased with the agency's intrusion into people's privacy. Tankado auctions the algorithm on his website, threatening that his accomplice, "North Dakota (e-mail address being NDakota)", will release the algorithm for free if he dies. Tankado is found dead in Seville, Spain. Fletcher, along with her fiancé, David Becker, a skilled linguist with eidetic memory, must find a solution to stop the spread of the code. Has anybody else read this book? What did you think of it?