Re: [zapps-wg] Cut-off date for Powers of Tau Contributions

[Andrew Miller via zapps-wg]

Let me add a bit to this:
1. First of all, all the code you need to add your own rounds to
powers-of-tau is already provided in Sean's repo. You could fork the
repository and add more rounds yourself if you wanted to. You could also
start using the powers-of-tau from early phases if you want too.
2. While we'll go along with Sean's suggestion to conclude the "official"
one on Mar 15, which will be used for Sapling, if there's interest from the
community in continuing to add more rounds, the Foundation will continue to
facilitate that, probably in another branch to avoid any confusion.
3. So far we have only been doing powers of tau for the 2^21 size circuit,
over the BLS12-381 curve. If there is any interest in conducting Powers of
Tau for larger circuit sizes, or for different curves (such as the
alt_bn128 supported in Ethereum), then the Foundation would support that
too. Although someone would have to adapt Sean's or FiloSottile's code to
do so...

Cheers,

On Mon, Mar 5, 2018 at 11:03 PM, Sean Bowe via zapps-wg <
zapps...@lists.z.cash.foundation> wrote:

> We're almost finished with the Powers of Tau ceremony!
>
> On March 15 no new contributions will be accepted. If you still want to
> participate, you will need to contact Jason Davies ASAP and arrange for a
> time.
>
> I'll be making an announcement about the random beacon soon.
>
> Thanks,
>
> Sean
>



-- 
Andrew Miller
University of Illinois at Urbana-Champaign

[zapps-wg] Powers of Tau Attestation by Marco Giglio

[Marco Giglio via zapps-wg]

Dear Powers of Tau's fellows, 

This is my attestation:

The BLAKE2b hash of `./response` is:
    9f9cad6a 61311a88 291f3b14 eb9808e3
    4b570b94 a1ad6cc7 3d7add21 32182df8
    17e7e6a6 d2fb0dcd 7ad9526b 6e05038c
    5592fb74 e41ddfd6 50c1f0d2 72062a69

__

I performed the computation on a Thinkpad T460p, running QubesOS R3.2. I
have used Sean Bowe's implementation, compiled with Rust 1.24.1 in a
Fedora-26 TemplateVM.

The computation was done on a dedicated, network-less paravirtualized
guest AppVM based on the Fedora-26 TemplateVM. Before starting the
computation, to prevent local side-channel attacks in the case one of my
untrusted AppVM is compromised, I have shutdown all the AppVMs running
on the machine, leaving only dom0 and the computation VM running. 

Once the computation was completed, I created a second networkless VM
where I moved the response. Then, I proceeded to delete the entire
computation VM and reboot the machine.

Best,

Marco Giglio



0x88F9948D.asc
Description: application/pgp-keys


signature.asc
Description: OpenPGP digital signature

[zapps-wg] Participation

[Artemis Tosini via zapps-wg]

Hello,

I emailed about participation a few weeks ago, but it seems it did not go 
through. Is there still space to participate in the powers of tao ceremony?

Thanks,
Artemis

-- 
  Artemis Tosini
  *@artemis.re