[zapps-wg] Powers of Tau Attestation 48

[Justin]

I had a conversation with filippo, he pushed one commit as he reproduced my problems (he said he broke it when adding -next)

So fingers crossed it works now!

Justin

> Am 02.02.2018 um 09:08 schrieb Sean Bowe via zapps-wg <zapps-wg at lists.z.cash.foundation>:
> 
> Awesome job, thank you so much. :)
> 
> By the way, the challenge file that Gabe used is located here:
> https://powersoftau-transcript.s3-us-west-2.amazonaws.com/challenge.48
> 
> I'd be curious to see why Filippo's Go code can't deserialize it.
> Maybe a platform specific bug?
> 
> Sean
> 
> On Thu, Feb 1, 2018 at 3:56 PM, Gabe Ortiz via zapps-wg
> <zapps-wg at lists.z.cash.foundation> wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA512
>> 
>> Powers of Tau Attestation by Gabe Ortiz (@signalnine)
>> =================================
>> 
>> Round: 48
>> Date: 2018-02-01
>> Location: Albuquerque, NM, USA
>> Commit version: d47a1d3d1f007063cbcc35f1ab902601a8b3bd91
>> 
>> SHA256 challenge file:
>> 35b60456f4d4a17ceefb1acfd0371d7134789319649cfd6bf77aca35d2824950
>> 
>> Blake2b response file:
>> The BLAKE2b hash of `./response` is:
>> 7c220a51 5804a837 d314eb18 f861198f
>> e1bff8e0 f3e4018f 68a6b2c6 8a4bc89b
>> 59a80446 52cc2602 4c3f72f9 32730700
>> 1bff8df0 429da619 70d6f587 72629732
>> 
>> 
>> Methodology
>> =========
>> 
>> The hardware used was a mid-2011 MacBook Air running OS X 10.11.6. WiFi and
>> Bluetooth were disabled and the MAC address of the WiFi adapter was blocked
>> at my router. I transferred the challenge file via USB drive. I first
>> attempted to use Filippo Valsorda’s golang implementation but ran into an
>> issue where it was throwing an error, “Failed to read the challenge: point
>> is compressed.” So, I ran the standard Rust implementation instead.
>> Additional entropy was produced via a USB-connected keyboard. I again
>> transferred the response and response hash via a USB drive to my
>> network-connected laptop for upload. The MacBook Air and the USB drive used
>> to do the compute was then destroyed.
>> 
>> Just for fun, here’s an imgur album of the laptop destruction (yes, we made
>> sure to avoid damage to the battery cells):
>> https://imgur.com/a/IkG3i
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