Codes and ciphers [electronic resource] : Julius Caesar, the Enigma, and the internet / R.F. Churchhouse.
By: Churchhouse, R. F.
Contributor(s): ebrary, Inc.
Material type:![materialTypeLabel](/opac-tmpl/lib/famfamfam/BK.png)
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Includes bibliographical references and indexes.
Electronic reproduction. Palo Alto, Calif. : ebrary, 2009. Available via World Wide Web. Access may be limited to ebrary affiliated libraries.
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