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SubjectRe: CIPE - Encrypted IP Encapsulation
Alan Cox wrote:

> > Are there any plans for a CIPE-like networking option in the kernel? or
> I'd love to BUT
>
> > just addons like this? Or wold it be possible just to merge the CIPE tree
> > into the kernel (it appears ready for it to be inserted into the
> > kernel..).
>
> We can't do it until the US government grows a braincell

Hang on for a second - with the new IP firewall chains code in the 2.1.x
kernel, you can do userspace filtering of packets, right? Could this
possibly be used to implement at least the IP-SEC layer?

Failing that, adding code to implement IP-SEC with the allowable key
length for US export would be possible, I imagine; of course, this is
dependant on the US government following their own rules, which I
wouldn't want to put money on. So, implement the IP-SEC layer in the
networking code using a nice 40 bit secret key. Make it all nice and
clean.

Of course, following the principals of good design and consistency, this
should be implemented as a nice layer in the API, or even as a plug
layer between two existing APIs. A modular version would be good, to
let those people who didn't want any encryption code cut it out, or
demand load it.

I have some vague memories of the US having some sort of rule against
shipping a product into which encryption could be "plugged" at a later
date, but if this got past the officials and was exportable, it would be
a fine and happy thing.

Oh, and the fact that it lets someone in a sane country write a plugin
replacement module with a real set of encryption routines, well,
wouldn't that be a real shame?

Of course, I am not a lawyer and probably have a very distorted idea of
what the US government are liable to allow or something...

Daniel

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