Digital Fortress

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9780312995423
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When the National Security Agency's code-breaking machine encounters a code it cannot decipher, the agency calls in Susan Fletcher, its head cryptographer. She discovers that the agency is being held to ransom with a code so complex that, if it was released, it would cripple U.S. intelligence
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Product Name Digital Fortress
Description When the National Security Agency's code-breaking machine encounters a code it cannot decipher, the agency calls in Susan Fletcher, its head cryptographer. She discovers that the agency is being held to ransom with a code so complex that, if it was released, it would cripple U.S. intelligence
ISBN-13 (GTIN) 9780312995423
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