Brown, Dan <br/><br/>
Digital fortress / 
Dan Brown. 
 - New York :  Thomas Dune Books,  c1998. 
 - 371 pages;  21 cm. 
<br/><br/> A thriller centering on Susan Fletcher, a cryptographer at the NSA who confronts an unbreakable code named "Digital Fortress." When she investigates, she uncovers a national-security crisis with dire moral and political consequences, racing to save intelligence integrity—and her own life. 
<br/><br/><label>ISBN: </label>0312263120 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Intelligence officers--Fiction.<br/>Computer security--Fiction.<br/>Cryptographers--Fiction.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Suspense fiction.
<br/><br/><label>Dewey Class. No.: </label>FIC B877 1998