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Detecting 128 bit browser capability  RSS feed

Matt DeLacey
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There are websites (banking sites come to mind) where they check to see if you browser can do 128 bit encryption. OK, how can you do this? I know this:
1.) I can tell if you have a 40 bit or 128 bit Netscape browser.
but DON'T know:
if you've got 128 bit encryption turned OFF on your 128 bit browser.
2.) I can also tell if you have a browser that is supposed to have 128 bit encryption in terms of IE and Netscape. I can make that determination. But with IE it's tricky because on the boundary (around 4.0) some do and some don't.
My thin is, I want to disallow any HTTPS where the intial SSL handshake is less than 128 bit encryption. Is this possible? If so, how? I want it to be very robust, so if your answer is: if it's IE 4.0 or better and Netscape 4.7 or better, you're okay, well, thanks, but I'm looking for a better way.
Any suggestions would be REALLY appreciated.
With Respect,
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