Pritchard John A T <br/><br/>
Data encryption 

 -  1980 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>36109 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer science
<br/><br/><label>Dewey Class. No.: </label>D65,8(B), M0