<HEAD> <TITLE>"Cipher Block Chaining Mode (CBC)"</Title> </HEAD> <BODY> <A NAME="pgtop"></A> <A HREF="indexc.htm"><Img Src="flconts.gif"></A> <A HREF="index2.htm"><Img Src="fllarrow.gif"></A> <A HREF="index4.htm"><Img Src="flrarrow.gif"></A> <BR> <IMG BORDER=0 SRC="index3.gif" > <HR> <A NAME="pgbot"></A> <BR> <FONT SIZE="-2">Published by Lotus® Freelance Graphics® </BODY>