Churchhouse, R. F. <br/><br/>
Codes and ciphers  Julius Caesar, the Enigma, and the internet /  [electronic resource] : 
R.F. Churchhouse. 
 - Cambridge ;  New York :  Cambridge University Press,  2002. 
 - x, 240 p. :  ill. 
<br/><br/>Includes bibliographical references and indexes. 
<br/><br/><br/>Electronic reproduction. <br/>Palo Alto, Calif. : <br/>ebrary, <br/>2013. <br/>Available via World Wide Web. <br/>Access may be limited to ebrary affiliated libraries. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>LCCN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cryptography.<br/>Ciphers.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Electronic books.
<br/><br/><label>LC Class. No.: </label>Z103  / .C48 2002eb 
<br/><br/><label>Dewey Class. No.: </label>652/.8