Simson Garfinkel & Gene Spafford - <br/><br/>
Practical Unix And Internet Security 

 - 2nd ed 
 -   O'reilly  ©1996 
<br/><br/><label>ISBN: </label>9781565921481  105 
<br/><br/><label>Dewey Class. No.: </label>005.432 GAR.2