[Cryptography] Christmas challenge greetings

Peter Gutmann pgut001 at cs.auckland.ac.nz
Wed Dec 22 19:16:09 EST 2021


Phillip Hallam-Baker <phill at hallambaker.com> writes:

>The following three pieces of data suddenly came together in my mind:
>
>1) An IPv6 Address is 128 bits.
>2) IPv6 headers all have to and from addresses but from field is redundant
>most of the time so there are 256 bits of addressing.
>3) Curve25519 public keys fit in 255 bits.
>
>So who can propose the most outrageous proposal that makes use of these three
>facts?

Ah, I see what you're getting at: Ignore #3 and sell ephemeral IPv6 addresses
as NFTs.  Very clever!

Peter.



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