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[liberationtech] [cryptography] [ipv6hackers] opportunistic encryption in IPv6

Peter Todd pete at
Wed Jun 12 10:19:03 PDT 2013

On Wed, Jun 12, 2013 at 05:59:38PM +0200, Eugen Leitl wrote:
> Here, I just don't understand the logic.  To me, encrypting without
> authenticating buys you absolutely nothing, except to burn CPU cycles
> and contribute to global warming.  In the *vast* majority of
> networking technology we use, modifying data in transit is just as
> easy as passively reading data in transit, within a constant factor.
> (That is, in a big-O sense, these are the same difficulty.)

So what?

Being able to detect if you are being attacked, even if most people
don't bother, is a huge step forward over having no way of knowing at


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