Re: [zapps-wg] Powers of Tau Ceremony Proposal

[Eric L. Stromberg via zapps-wg]

-BEGIN PGP SIGNED MESSAGE-Hash: SHA512Powers of Tau Operational writeup=Round: 7Date: 2017-11-16Name: Eric L. StrombergLocation: San Francisco area, USChallenge: 2ae068fbe1a9d0e070844047f3032432e86b822f593da3fcd6fc0ee8bed2f30caac587a1d5e68ea6fcdcf1a40213de7d41ded05cf9be934e4c6d617e201caa1aResponse: 1ad851c65b4fcf3ca0bce6b366c40c48b65f611044731faf2b5fc90f987eda3f3240ea25c555e516ff73de2855369fd2da77a7055529b6f72ac3225b07fd8585 Preparation steps=UBUNTUBuild VM & compute node OS from: ubuntu-16.04.3-desktop-amd64.isoSHA256: 1384ac8f2c2a6479ba2a9cbe90a585618834560c477a699a4a7ebe7b5345ddc1  Build VM, create compute binary:Created new Ubuntu 16.04.3 VM from ISOFollowed instructions indicated in repository Readme to build “compute” binaryhttps://github.com/ebfull/powersoftau [commit 9e1553c437183540392a7231d0788318a19b18a3]Formatted fresh 8GB USB stick, copied compute binary to it.BLAKE2b-64 (./compute) = 7af5d31bbb215eab40753043523790483cdda67aef1d6e317f4269fb042dbc8608feaa0db8d17df82bef28f021509871635a56052de1370f4b90dc6322a8a962Setup minimal compute node (ASUS 1015E laptop, 2GB RAM, Celeron 847, 320GB HDD):Flash BIOS with latest (2013/05/23) from: http://dlcdnet.asus.com/pub/ASUS/nb/1015E/1015EAS304.zipSHA256: 9ee3256bbc7116388a6c5079773d8ac28471f0cfbb2db8784e403c36c3bbd9bb  Install ubuntu 16.04.3 from DVD: erase and reinstall, no network, no updates.Copy compute binary and challenge file from USB stick.MAC OSXBuild VM, create compute binary:Used “Install macOS Sierra 10.12.app” from Apple.Followed same steps as above to create “compute” binary.BLAKE2b-64 (./compute) = 88565a9e84c9ee69818e78909b7f6b05ef46a88780b8378d44a037be7e8fd50c7c601e8340455be2ed9e703095baf3f9104fded0086576c9c43c36fb6bf9Installed MacOS on external SSD drive with “Install macOS High Sierra 10.13.0.app” from Apple.To be used as boot image for MacBook Pro laptop, second compute node  (Internal disk is encrypted).Copied compute binary and challenge to SSD drive.Workspace preparation:An interior closet containing a heavy gauge steal gun safe was lined with multiple layers of foil shielding to allow access to the compute node keyboard with the safe door open and still limit EM leakage.  Compute node, USB stick and 8 hexadecimal dice in a dice box placed in safe, with a power cord routed through the safe door opening: https://www.dropbox.com/s/ysfmhre0cjkhe1g/tinfoilsafe.jpeg?dl=0Procedure=For each of 3 compute runs, door to closet closed to effectively create a faraday room with safe containing the compute node (laptop) inside.  Safe door open to allow access to keyboard and screen.  Ran ./compute and when prompted, provided 64 bytes of entropy with 4 rolls of 8 hexadecimal dice in a box used to both randomize them and to order them unambiguously.  Once compute process was underway, closed and locked safe until completion of the compute process.Sidechannel defensesThe ASUS compute node is a 4 year old device, ordered by me through Amazon with 2-day shipping, with Ubuntu 12.04 factory installed; reimaged with w/16.04.3 for this exercise.  Was previously turned on once to set it up / verify and not otherwise used or connected to any network.  Node has been air gapped at all times since purchase.  The MAC compute node is a personal device and well used.  The Mac OS image created on an external drive for this exercise was never network connected and erased immediately afterwards.  The internal drive is encrypted and was not accessible to the boot image used.  All 3 production compute runs were performed in a rural area with no other structures or public roads within 100 yards in any direction.  The compute nodes were operated in a heavy gun safe within an interior closet shielded with foil to control EM leakage even when the safe door was open for keyboard access.  The safe was kept closed and locked during computation.  One of 3 results was randomly selected for submission without attribution.Postprocessing==ASUS: copied hash and response file to USB stick.  Battery removed from compute node.  Copied hash and response to personal laptop then securely erased USB and overwrote with random data.  I did not destroy the node, but it will remain unpowered and locked in a safe for at least one month and will either never be used again (and be destroyed) or will be used only as an offline signing device, securely stored and never connected to any network. MAC: after each of the 2 compute runs, copied hash onto SSD drive.  Powered off Mac.  Copied hash and response files to personal laptop then securely erased SSD (boot drive) and overwrote with random data.  Will continue to use SSD and Mac for other purposes.  A roll of hexadecimal dice was used to select 1 of the 3 response files.  50% probability given to result generated on the ASUS node and 25% probability given to each result from the MAC node.  The randomly selected result was verified and submitted - 

Re: [zapps-wg] Powers of Tau Ceremony Proposal

[Jared Tobin via zapps-wg]

Hi all, here's my report:

Powers of Tau Operational Writeup
=

Round: 3
Date: 2017-11-12
Name: Jared Tobin
Location: Auckland, NZ

Challenge:
e712fa22f1d027a0b4ce3ef698f26d5cab07c3380e4c24a479a914c85617fd1a2960b386cceb5c94718979010a1b7ed8b6145da872f0744e06503bd664fe7283
Response:
cb48afb82ab4c476ae741633c3eb6643e7700dc7b2b4701af91e3cc932270b96c375e5f3a5c20c96fac6c9b40a5bba6c956d66f223f090c545c277aa05427757

Preparation Steps
=

Being somewhat pressed for time and hardware, I recruited several
geographically-distributed volunteers that I know well and trust
completely to help me out.  In the end, the following volunteers were
able to get back to me in time:

* Shawn Tobin (RSA Canada)
* Fredrik Harryson (Parity Technologies)
* Jason Forbes (Kraken Sonar Systems)

I set up a private Keybase team with the above volunteers, distributed
the challenge to them over KBFS, and gave them instructions over the
team chat on how to proceed.  Each was to add entropy and compute the
response locally using whatever mechanisms they preferred (report not
required), then return their response/hash pairs to me over KBFS.  Each
member was to use the code in Sean's powersoftau repository as of commit
9e1553c437183540392a7231d0788318a19b18a3 to perform the computation.

Procedure
=

I computed a response locally in rather mundane fashion using rustc
1.21.0 on an early-2015 model Macbook Air running Sierra.  Eventually
the volunteers managed to upload their response/hash pairs to KBFS, and
I randomly selected one of the resulting four responses to submit for my
piece of the MPC.

I uploaded the resulting response via the handy app Sean provided me with.

Side channel defences
=

I used broad geographical distribution and randomness to mitigate the
possibility of successful side channel attacks.  Shawn was located in
Vancouver, Canada, Fredrik was located in Malmö, Sweden, and Jason was
located in St. John's, Canada.

I selected the response to upload by pre-determining a correspondence
between names and numbers, and then walking outside and asking the first
stranger I saw to pick a number between one and four.

- jared


On Sat, Nov 11, 2017 at 12:25:33AM +, Jason Davies via zapps-wg wrote:
> Hi all,
>
> Here is my report:
>
> Powers of Tau Operational Writeup
> =
>
> Round: 2
> Date: 2017-11-10
> Name: Jason Davies
> Location: London, UK
>
> Challenge: 
> 467bc84f6eb98ff956eaf12a1b7ef4dc0aff1093c7a0d5c1dfbdb85bbfffb20a43965d0daefee3fec6c1a47af69100e117b44b74371824ac8af1e33b6f91add5
> Response: 
> 2f728af894524f55bda7a3e2c2e2db6a57a992811e90ed57456d62aead5106cdc5c97c86532d14b5185cc74d169f1b0c2c0ef1e582231ffa7936da55047c0cb2
>
> Preparation Steps
> =
>
> Git repository: https://github.com/ebfull/powersoftau
> Commit hash: 9e1553c437183540392a7231d0788318a19b18a3
> Compiler: rustc 1.23.0-nightly (d6b06c63a 2017-11-09)
> Build: cargo build --release --features=u128-support
> b2sum(./target/release/compute): 
> be42f68b07c5c857bb6561a9ac2967d671ef412a71c87c2fb31776a6ab38c756736de66e554553021e129ecab45d922092873df8b71bd9a775ec05f189485198
>
> I used a brand new 16GB USB stick and loaded ubuntu-17.04-desktop-amd64.iso; 
> b2sum: 
> 6a1c975b25b4e7f2dbf4fda84fe8b5de3ed6f4532b8c4f17e533ed11a0a8b5b9ad9fb83e8e4b89447c3a427be73f77a5f7c71b7f733fcc4bebf346e9c5c0de43.
>
> I reformatted a second brand new 16GB USB stick to ext4, then copied the
> `challenge` file and the `target/release/compute` binary.
>
> Sidechannel Defences
> 
>
> First of all, I lined a large cardboard box with aluminium foil in order to
> make a rudimentary faraday cage.  Then, I assembled an airgap compute node
> using some relatively cheap parts, putting them all inside the box:
>
> * Motherboard: Asus H81 Pro BTC (no radio, bluetooth or speakers AFAIK)
> * CPU: Intel G1840
> * Ram: 2x cheap 1GB sticks
> * PSU: EVGA SuperNOVA 1300 G2
> * Monitor: old Dell TFT display
> * Keyboard: generic USB keyboard
>
> No other peripherals or cables were connected.  I placed the compute node in 
> my
> cellar (~6ft below ground level) and I remained with the node during the 
> entire
> time it was computing, without using any other devices in the vicinity (no
> mobile phone etc.)  The only cables coming out of the box were the two power
> cables, one for the PSU and one for the monitor.
>
> Image: https://pbs.twimg.com/media/DOT55KUXUAEV44-.jpg:large
>
> Procedure
> =
>
> I booted the node, with "Try Ubuntu" (Live CD mode).  Then, I inserted the
> challenge USB stick and ran `./compute` in the USB media directory, entering
> some additional entropy as requested by typing randomly on the keyboard.  The
> box lid was only partially opened to allow use of the keyboard and to view the
> monitor at this point.  After 60 minutes had passed, I looked inside the lid
> and saw that the computation had completed, so I wrote down the 

Re: [zapps-wg] Powers of Tau Ceremony Proposal

[Sean Bowe via zapps-wg]

Kobi Gurkan (from QED-it) wishes to go after cody. I'll double-check later.

On Sat, Nov 11, 2017 at 4:12 AM, cody burns  wrote:
> I will go after the unnamed party.
>
>
> On Sat, Nov 11, 2017 at 3:21 AM Sean Bowe via zapps-wg
>  wrote:
>>
>> All is verified and mirrored so far! Thanks!
>>
>> I've invited someone else to be next, but I'm not sure if they wanted
>> me to identify them publicly before they were finished.
>>
>> Sean
>>
>> On Fri, Nov 10, 2017 at 5:25 PM, Jason Davies 
>> wrote:
>> > Hi all,
>> >
>> > Here is my report:
>> >
>> > Powers of Tau Operational Writeup
>> > =
>> >
>> > Round: 2
>> > Date: 2017-11-10
>> > Name: Jason Davies
>> > Location: London, UK
>> >
>> > Challenge:
>> > 467bc84f6eb98ff956eaf12a1b7ef4dc0aff1093c7a0d5c1dfbdb85bbfffb20a43965d0daefee3fec6c1a47af69100e117b44b74371824ac8af1e33b6f91add5
>> > Response:
>> > 2f728af894524f55bda7a3e2c2e2db6a57a992811e90ed57456d62aead5106cdc5c97c86532d14b5185cc74d169f1b0c2c0ef1e582231ffa7936da55047c0cb2
>> >
>> > Preparation Steps
>> > =
>> >
>> > Git repository: https://github.com/ebfull/powersoftau
>> > Commit hash: 9e1553c437183540392a7231d0788318a19b18a3
>> > Compiler: rustc 1.23.0-nightly (d6b06c63a 2017-11-09)
>> > Build: cargo build --release --features=u128-support
>> > b2sum(./target/release/compute):
>> > be42f68b07c5c857bb6561a9ac2967d671ef412a71c87c2fb31776a6ab38c756736de66e554553021e129ecab45d922092873df8b71bd9a775ec05f189485198
>> >
>> > I used a brand new 16GB USB stick and loaded
>> > ubuntu-17.04-desktop-amd64.iso; b2sum:
>> > 6a1c975b25b4e7f2dbf4fda84fe8b5de3ed6f4532b8c4f17e533ed11a0a8b5b9ad9fb83e8e4b89447c3a427be73f77a5f7c71b7f733fcc4bebf346e9c5c0de43.
>> >
>> > I reformatted a second brand new 16GB USB stick to ext4, then copied the
>> > `challenge` file and the `target/release/compute` binary.
>> >
>> > Sidechannel Defences
>> > 
>> >
>> > First of all, I lined a large cardboard box with aluminium foil in order
>> > to
>> > make a rudimentary faraday cage.  Then, I assembled an airgap compute
>> > node
>> > using some relatively cheap parts, putting them all inside the box:
>> >
>> > * Motherboard: Asus H81 Pro BTC (no radio, bluetooth or speakers AFAIK)
>> > * CPU: Intel G1840
>> > * Ram: 2x cheap 1GB sticks
>> > * PSU: EVGA SuperNOVA 1300 G2
>> > * Monitor: old Dell TFT display
>> > * Keyboard: generic USB keyboard
>> >
>> > No other peripherals or cables were connected.  I placed the compute
>> > node in my
>> > cellar (~6ft below ground level) and I remained with the node during the
>> > entire
>> > time it was computing, without using any other devices in the vicinity
>> > (no
>> > mobile phone etc.)  The only cables coming out of the box were the two
>> > power
>> > cables, one for the PSU and one for the monitor.
>> >
>> > Image: https://pbs.twimg.com/media/DOT55KUXUAEV44-.jpg:large
>> >
>> > Procedure
>> > =
>> >
>> > I booted the node, with "Try Ubuntu" (Live CD mode).  Then, I inserted
>> > the
>> > challenge USB stick and ran `./compute` in the USB media directory,
>> > entering
>> > some additional entropy as requested by typing randomly on the keyboard.
>> > The
>> > box lid was only partially opened to allow use of the keyboard and to
>> > view the
>> > monitor at this point.  After 60 minutes had passed, I looked inside the
>> > lid
>> > and saw that the computation had completed, so I wrote down the BLAKE2b
>> > hash,
>> > and unmounted and removed the USB stick, and then powered the node down.
>> >
>> > Postprocessing
>> > ==
>> >
>> > I took the USB stick and transferred the response file to my laptop, and
>> > then
>> > uploaded it using the laptop to S3 via Sean Bowe's transcript site.
>> >
>> > I did not destroy the compute node but I'm unlikely to use it or plug it
>> > in for
>> > some time.
>> > --
>> > Jason Davies, https://www.jasondavies.com
>> >
>> >
>> >
>> >
>> >> On 10 Nov 2017, at 22:11, Sean Bowe via zapps-wg
>> >>  wrote:
>> >>
>> >> Thanks Andrew! That's a great start.
>> >>
>> >> Now it's Jason Davies' turn.
>> >>
>> >> The entire transcript will appear here throughout the process:
>> >>
>> >> https://powersoftau-transcript.s3-us-west-2.amazonaws.com/index.html
>> >>
>> >> We can make a more formal announcement once we're in the groove and
>> >> everything looks good. We're getting a repo up with attestations soon
>> >> also.
>> >>
>> >> Sean
>> >>
>> >> On Fri, Nov 10, 2017 at 12:53 PM, Andrew Miller 
>> >> wrote:
>> >>> OK, I'll go first. Below is my report:
>> >>>
>> >>> Powers of Tau Operational writeup
>> >>> =
>> >>> Round: 1
>> >>> Date: 2011-11-10
>> >>> Name: Andrew Miller
>> >>> Location: Champaign, Illinois
>> >>>
>> >>> Challenge: (genesis)
>> >>>
>> >>> 

Re: [zapps-wg] Powers of Tau Ceremony Proposal

[cody burns via zapps-wg]

I will go after the unnamed party.


On Sat, Nov 11, 2017 at 3:21 AM Sean Bowe via zapps-wg
 wrote:

> All is verified and mirrored so far! Thanks!
>
> I've invited someone else to be next, but I'm not sure if they wanted
> me to identify them publicly before they were finished.
>
> Sean
>
> On Fri, Nov 10, 2017 at 5:25 PM, Jason Davies 
> wrote:
> > Hi all,
> >
> > Here is my report:
> >
> > Powers of Tau Operational Writeup
> > =
> >
> > Round: 2
> > Date: 2017-11-10
> > Name: Jason Davies
> > Location: London, UK
> >
> > Challenge:
> 467bc84f6eb98ff956eaf12a1b7ef4dc0aff1093c7a0d5c1dfbdb85bbfffb20a43965d0daefee3fec6c1a47af69100e117b44b74371824ac8af1e33b6f91add5
> > Response:
> 2f728af894524f55bda7a3e2c2e2db6a57a992811e90ed57456d62aead5106cdc5c97c86532d14b5185cc74d169f1b0c2c0ef1e582231ffa7936da55047c0cb2
> >
> > Preparation Steps
> > =
> >
> > Git repository: https://github.com/ebfull/powersoftau
> > Commit hash: 9e1553c437183540392a7231d0788318a19b18a3
> > Compiler: rustc 1.23.0-nightly (d6b06c63a 2017-11-09)
> > Build: cargo build --release --features=u128-support
> > b2sum(./target/release/compute):
> be42f68b07c5c857bb6561a9ac2967d671ef412a71c87c2fb31776a6ab38c756736de66e554553021e129ecab45d922092873df8b71bd9a775ec05f189485198
> >
> > I used a brand new 16GB USB stick and loaded
> ubuntu-17.04-desktop-amd64.iso; b2sum:
> 6a1c975b25b4e7f2dbf4fda84fe8b5de3ed6f4532b8c4f17e533ed11a0a8b5b9ad9fb83e8e4b89447c3a427be73f77a5f7c71b7f733fcc4bebf346e9c5c0de43.
> >
> > I reformatted a second brand new 16GB USB stick to ext4, then copied the
> > `challenge` file and the `target/release/compute` binary.
> >
> > Sidechannel Defences
> > 
> >
> > First of all, I lined a large cardboard box with aluminium foil in order
> to
> > make a rudimentary faraday cage.  Then, I assembled an airgap compute
> node
> > using some relatively cheap parts, putting them all inside the box:
> >
> > * Motherboard: Asus H81 Pro BTC (no radio, bluetooth or speakers AFAIK)
> > * CPU: Intel G1840
> > * Ram: 2x cheap 1GB sticks
> > * PSU: EVGA SuperNOVA 1300 G2
> > * Monitor: old Dell TFT display
> > * Keyboard: generic USB keyboard
> >
> > No other peripherals or cables were connected.  I placed the compute
> node in my
> > cellar (~6ft below ground level) and I remained with the node during the
> entire
> > time it was computing, without using any other devices in the vicinity
> (no
> > mobile phone etc.)  The only cables coming out of the box were the two
> power
> > cables, one for the PSU and one for the monitor.
> >
> > Image: https://pbs.twimg.com/media/DOT55KUXUAEV44-.jpg:large
> >
> > Procedure
> > =
> >
> > I booted the node, with "Try Ubuntu" (Live CD mode).  Then, I inserted
> the
> > challenge USB stick and ran `./compute` in the USB media directory,
> entering
> > some additional entropy as requested by typing randomly on the
> keyboard.  The
> > box lid was only partially opened to allow use of the keyboard and to
> view the
> > monitor at this point.  After 60 minutes had passed, I looked inside the
> lid
> > and saw that the computation had completed, so I wrote down the BLAKE2b
> hash,
> > and unmounted and removed the USB stick, and then powered the node down.
> >
> > Postprocessing
> > ==
> >
> > I took the USB stick and transferred the response file to my laptop, and
> then
> > uploaded it using the laptop to S3 via Sean Bowe's transcript site.
> >
> > I did not destroy the compute node but I'm unlikely to use it or plug it
> in for
> > some time.
> > --
> > Jason Davies, https://www.jasondavies.com
> >
> >
> >
> >
> >> On 10 Nov 2017, at 22:11, Sean Bowe via zapps-wg
>  wrote:
> >>
> >> Thanks Andrew! That's a great start.
> >>
> >> Now it's Jason Davies' turn.
> >>
> >> The entire transcript will appear here throughout the process:
> >>
> >> https://powersoftau-transcript.s3-us-west-2.amazonaws.com/index.html
> >>
> >> We can make a more formal announcement once we're in the groove and
> >> everything looks good. We're getting a repo up with attestations soon
> >> also.
> >>
> >> Sean
> >>
> >> On Fri, Nov 10, 2017 at 12:53 PM, Andrew Miller 
> wrote:
> >>> OK, I'll go first. Below is my report:
> >>>
> >>> Powers of Tau Operational writeup
> >>> =
> >>> Round: 1
> >>> Date: 2011-11-10
> >>> Name: Andrew Miller
> >>> Location: Champaign, Illinois
> >>>
> >>> Challenge: (genesis)
> >>>
> ce00f2100dd876fdff8dd824f55307bcb72d724f29ff20b9e0760f3a65e5588a65eaed57cbc61697111ae1f4cc7da2e62a85311c2ae683a041fb872b891c68dc
> >>> Response:
> >>>
> 15729e0edc4201dc5ee6241437d926f614cb4214ff1b9c6fbd73daf401639f7a4238cf04bc94edac9f2ad037003daab9a4408ba7c62a4413dc2a0ddd683bd719
> >>> ./response-2017-11-10-amiller
> >>>
> >>> Preparation steps
> >>> =
> >>> I used Sean’s powersoftau rust 

Re: [zapps-wg] Powers of Tau Ceremony Proposal

[Jason Davies via zapps-wg]

Hi all,

Here is my report:

Powers of Tau Operational Writeup
=

Round: 2
Date: 2017-11-10
Name: Jason Davies
Location: London, UK

Challenge: 
467bc84f6eb98ff956eaf12a1b7ef4dc0aff1093c7a0d5c1dfbdb85bbfffb20a43965d0daefee3fec6c1a47af69100e117b44b74371824ac8af1e33b6f91add5
Response: 
2f728af894524f55bda7a3e2c2e2db6a57a992811e90ed57456d62aead5106cdc5c97c86532d14b5185cc74d169f1b0c2c0ef1e582231ffa7936da55047c0cb2

Preparation Steps
=

Git repository: https://github.com/ebfull/powersoftau
Commit hash: 9e1553c437183540392a7231d0788318a19b18a3
Compiler: rustc 1.23.0-nightly (d6b06c63a 2017-11-09)
Build: cargo build --release --features=u128-support
b2sum(./target/release/compute): 
be42f68b07c5c857bb6561a9ac2967d671ef412a71c87c2fb31776a6ab38c756736de66e554553021e129ecab45d922092873df8b71bd9a775ec05f189485198

I used a brand new 16GB USB stick and loaded ubuntu-17.04-desktop-amd64.iso; 
b2sum: 
6a1c975b25b4e7f2dbf4fda84fe8b5de3ed6f4532b8c4f17e533ed11a0a8b5b9ad9fb83e8e4b89447c3a427be73f77a5f7c71b7f733fcc4bebf346e9c5c0de43.

I reformatted a second brand new 16GB USB stick to ext4, then copied the
`challenge` file and the `target/release/compute` binary.

Sidechannel Defences


First of all, I lined a large cardboard box with aluminium foil in order to
make a rudimentary faraday cage.  Then, I assembled an airgap compute node
using some relatively cheap parts, putting them all inside the box:

* Motherboard: Asus H81 Pro BTC (no radio, bluetooth or speakers AFAIK)
* CPU: Intel G1840
* Ram: 2x cheap 1GB sticks
* PSU: EVGA SuperNOVA 1300 G2
* Monitor: old Dell TFT display
* Keyboard: generic USB keyboard

No other peripherals or cables were connected.  I placed the compute node in my
cellar (~6ft below ground level) and I remained with the node during the entire
time it was computing, without using any other devices in the vicinity (no
mobile phone etc.)  The only cables coming out of the box were the two power
cables, one for the PSU and one for the monitor.

Image: https://pbs.twimg.com/media/DOT55KUXUAEV44-.jpg:large

Procedure
=

I booted the node, with "Try Ubuntu" (Live CD mode).  Then, I inserted the
challenge USB stick and ran `./compute` in the USB media directory, entering
some additional entropy as requested by typing randomly on the keyboard.  The
box lid was only partially opened to allow use of the keyboard and to view the
monitor at this point.  After 60 minutes had passed, I looked inside the lid
and saw that the computation had completed, so I wrote down the BLAKE2b hash,
and unmounted and removed the USB stick, and then powered the node down.

Postprocessing
==

I took the USB stick and transferred the response file to my laptop, and then
uploaded it using the laptop to S3 via Sean Bowe's transcript site.

I did not destroy the compute node but I'm unlikely to use it or plug it in for
some time.
--
Jason Davies, https://www.jasondavies.com



report.asc
Description: Binary data


> On 10 Nov 2017, at 22:11, Sean Bowe via zapps-wg 
>  wrote:
> 
> Thanks Andrew! That's a great start.
> 
> Now it's Jason Davies' turn.
> 
> The entire transcript will appear here throughout the process:
> 
> https://powersoftau-transcript.s3-us-west-2.amazonaws.com/index.html
> 
> We can make a more formal announcement once we're in the groove and
> everything looks good. We're getting a repo up with attestations soon
> also.
> 
> Sean
> 
> On Fri, Nov 10, 2017 at 12:53 PM, Andrew Miller  wrote:
>> OK, I'll go first. Below is my report:
>> 
>> Powers of Tau Operational writeup
>> =
>> Round: 1
>> Date: 2011-11-10
>> Name: Andrew Miller
>> Location: Champaign, Illinois
>> 
>> Challenge: (genesis)
>> ce00f2100dd876fdff8dd824f55307bcb72d724f29ff20b9e0760f3a65e5588a65eaed57cbc61697111ae1f4cc7da2e62a85311c2ae683a041fb872b891c68dc
>> Response:
>> 15729e0edc4201dc5ee6241437d926f614cb4214ff1b9c6fbd73daf401639f7a4238cf04bc94edac9f2ad037003daab9a4408ba7c62a4413dc2a0ddd683bd719
>> ./response-2017-11-10-amiller
>> 
>> Preparation steps
>> =
>> I used Sean’s powersoftau rust repo, commit
>> 9e1553c437183540392a7231d0788318a19b18a3
>> 
>> I followed instructions online for building portable rust binaries,
>> and so I ran
>> ```
>> cargo build --target=x86_64-unknown-linux-musl --release
>> --features=u128-support --bin=compute
>> ```
>> 
>> Compiler: rustc 1.23.0-nightly (02004ef78 2017-11-08)
>> 
>> I copied the resulting binary to a freshly formatted USB stick I had.
>> 
>> b2sum:
>> 9059a0a64f5021c36df630ca48ac40674862b2fea14f4843ff2150256b95162ac4d6d1621d2dd3f5d0d1c604ad8e581c0ff449d2449140380eab075a9b83c960
>> ./target/x86_64-unknown-linux-musl/release/compute
>> 
>> I also rummaged through my shelf of several USB sticks, and found one
>> that happened to be a Linux Mint 18 USB bootable disk, so I used that
>> for my operating system.
>> 
>>