Re: [art] Thursday lunch discussion on new techniques for stopping robocalling

Hi Jonathan, Cullen,

I was somewhat surprised that the draft did not have a direct reference to
the SIP Hashcash work (especially since Cullen was the author of
https://tools.ietf.org/html/draft-jennings-sip-hashcash-06).  From my
perspective at least, it still looks to be a useful historical antecedent
to consult, since it is a proof-of-work system (and one on which a bunch of
later cryptocurrencies draw).  In particular, its view that this is about a
demonstration of work rather than a payment to send may still be a valuable
perspective.

http://www.hashcash.org/ still appears to be up, by the way, for folks that
want to see how its original use case tied into thwarting denial of service
attacks.

Ted

On Sat, Mar 17, 2018 at 6:33 AM, Jonathan Rosenberg <jdrosen@jdrosen.net>
wrote:

> Folks -
>
> The problem of robocalling on the PSTN has only continued to increase over
> the last few years. As with any battle this significant, we need multiple
> tools on the table that can be used to fight it. Recently, Cullen and I
> proposed some new ideas for techniques to work in concert with STIR -
> notably https://tools.ietf.org/html/draft-rosenberg-stir-sipcoin-00 and
> https://tools.ietf.org/html/draft-rosenberg-stir-callback-00.html . We'd
> like to hold a lunch discussion to discuss these concepts and more
> importantly, discuss other possible ideas people have on work the IETF can
> do to increase the number of weapons in the arsenal.
>
> We've got a room booked on Thursday lunch, room Hilton Meeting Rooms 1-4.
> Anyone who'd like to discuss is welcome to join.
>
> Thx,
> Jonathan R.
>
>
> --
> Jonathan Rosenberg, Ph.D.
> jdrosen@jdrosen.net
> http://www.jdrosen.net
>
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