GUPTA ,K.N & OTHERS <br/><br/>
DIGITAL SIGNATURE: NETWORK SECURITY PRACTICES 

 - NEW DELHI  PHI  2005 
 - x+209p.,23X18Cms. 
<br/><br/><label>ISBN: </label>8120325990 
<br/><br/><label>Dewey Class. No.: </label>621.38196428 G896