Beckett, Brian. , <br/><br/>
Introduction to crytology and PC security / 
Brian Beckett. 
<br/><br/><label>ISBN: </label>007709235X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer security.<br/>Data protection.<br/>Crystallography.
<br/><br/><label>LC Class. No.: </label>QA76.9   / .B42 1997