When the NSA's invincible code-breaking machine encounters a mysterious code it cannot break, the agency calls its head cryptographer, Susan Fletcher, a brilliant and beautiful mathematician. What she uncovers sends shock waves through the corridors of power. The NSA is being held hostage ... not by guns or bombs, but by a code so ingeniously complex that if released it wo...more
GoodReads: 3.48 of 5 stars - 221,885 ratings
Book Version: 510 pages
ISBN: 552151696 (ISBN13: 9780552151696)
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