The twofish encryption algorithm :  a 128-bit block cipher  

 - New York :  J. Wiley,  c1999. 
 - xi, 186 p. :  ill. ; 
<br/><br/> Wiley computer publishing. 
<br/><br/><label>ISBN: </label>0471353817 (acidfree paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer security<br/>Data encryption (Computer science)
<br/><br/><label>Dewey Class. No.: </label>005.82