On Sun, Jun 19, 2011 at 4:49 PM, Steven Bellovin <[email protected]> wrote:
> On Jun 19, 2011, at 5:36 05PM, Marsh Ray wrote:
>> Now I've heard everything. Javascript crypto proponents using it as an 
>> argument against SSL. Tell them that they should use SSL properly and 
>> consider that an argument against Javascript crypto instead. And hold on to 
>> your wallet.
>
> They solve different problems, at least if used correctly.  SSL secures
> the channel; Javascript secures (or can secure) the transmitted object itself.

Channel binding helps, if you can trust the end-points of the channel
after you've established that there's no MITM.  If you don't trust the
end-points of the channel even when you've shown there's no MITM then
there's no point using the channel at all, and all crypto has to be
done at a higher layer.

Channel binding allows you to do authentication at a higher layer,
where you have the correct context, and bind to lower layer channels,
which is where we've invested the most in hardware acceleration.

Nico
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