Richard smith E <br/><br/>
Elementary Information Security 

 - 3rd edition 
 -  Jones &Bartlett Learning , singapore  2021 
<br/><br/><label>ISBN: </label>978-1-284-15304-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer science
<br/><br/><label>Dewey Class. No.: </label>DW8 R21