Davies, Donald Watts. <br/><br/>
Security for computer networks :  an introduction to data security in teleprocessing and electronic funds transfer /  [Book]. 
D.W. Davies and W.L. Price. 
 - 2nd ed. 
 - Chichester [England] ;   New York :   Wiley,   1989. 
 - xx, 377 p. :   ill. ;   26 cm. 
 - Wiley series in communication and distributed systems .
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>0471921378 
<br/><br/><label>LCCN: </label>89014760 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Data transmission systems--Security measures.