128-bit encryption ?

From: JTA (norwood_professionals@hotmail.com)
Date: 02/21/03 

From: "JTA" <norwood_professionals@hotmail.com>
Date: Thu, 20 Feb 2003 20:33:43 -0800

how do I know if my browser has 128-bit encryption ?

then, how do I know if it is being used properly by a
highly secure site? eg: if I have 128, and they claim to
use 128, how do I know they are actually using 128 and not
less?