86 lines
3.6 KiB
Plaintext
86 lines
3.6 KiB
Plaintext
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA512
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edit: updated with proper sig
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Date: March 12th, 2018
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Time: 6:00pm to 8:00pm PDT
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Location: San Francisco, CA
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For the compute node of my Powers of Tau contribution, I used a
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refurbished late-2011 15" MacBook Pro, hardware which I've owned for
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2.5 years, running Tails 3.5 off a USB stick.
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I downloaded and compiled Filo Sottile's Golang implementation
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(https://github.com/FiloSottile/powersoftau) using Go 1.10 in Ubuntu
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17.10 on a separate desktop computer. I wiped another random USB stick
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in my possession and copied the 'taucompute' executable and the
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challenge file. Every time I copied the executable (on/off USB sticks,
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onto computers, etc.) I checked the SHA256 hash, which stayed the same
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throughout the process:
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79c56ad4f1422ec134adac02857dc168a98e663041ca65e88ee903712eaf489d
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This executable is available for inspection here:
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https://drive.google.com/file/d/1Dl_avSDNR1A1lcWH8oEmWp-VNsGvNQkp/view?usp=sharing
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I always wanted to use the coolest Faraday Cage I could find, so I set
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up my compute node in the top shelf of my apartment's fridge. Prior to
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initiating computation, I disconnected and powered down my apartment's
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wireless access point and manually turned off every device within 10
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feet of the fridge that had a radio. (note that I used my phone in
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airplane mode to take pictures after Tails booted...but I turned it
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off before computation began)
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I added randomness in an undisclosed manner before beginning
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computation. Computation began around 6:20pm PDT and finished at
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7:10pm PDT--no doubt my cool Fridge-aday Cage sped things up a bit.
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The fridge door was closed most of the time, but I periodically opened
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it (every 15 minutes) to check on computation. I never left the fridge
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out of my sight--and yes, there's definitely a "running fridge" joke
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here somewhere.
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Afterwards, I copied the response file onto another USB stick (along
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with the 'taucompute' executable) and copied them both back onto my
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desktop. The BLAKE2b hash of my response is:
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822885fe 28daad52 2ff771fc 849eaa1c
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c0cd5004 8249640e bf17560c e50cbc4a
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13b7669d 6091b671 bec0c57e 3997b600
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62198990 e74ef5c0 d739d3b3 ba58d3ab
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I tweeted the BLAKE2b hash of my response file here as well:
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https://twitter.com/acityinohio/status/973386393069105152
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My PGP public key is available via Keybase:
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https://keybase.io/cin/pgp_keys.asc
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I plan on destroying the Macbook Pro in a manner that will be revealed
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in a future blog post. Until then it remains powered off in my fridge
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except when I transport it for destruction.
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Thanks to Sean Bowe and everyone at the Zcash Company for building
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this incredible MPC, Jason Davies for organizing, and all the other
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participants in Powers of Tau! Glad I could contribute and make my
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first full-time day at the Zcash Foundation memorable. :)
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-----BEGIN PGP SIGNATURE-----
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Version: Keybase OpenPGP v2.0.76
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Comment: https://keybase.io/crypto
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wsFcBAABCgAGBQJap0jUAAoJEIfQk7UmWk/TaTgP/jNmAQ3DHH6BSKKCy6MOpbck
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bcjbszH+Ekbqo/7gd9HEbwjvBNyhIlMuL/CpH6dfazrzXBk9NLzlG3yASO2IValk
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4KEI2DeJ0HBx256Cnfr2Zn5xElkhV8vIkX32A20XwV7RuwkEr7NFCR6NqTpPnYPn
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dTFvbjK2s0CH0s6CZ+sXFcowYFCnxdiElG4ia9RnzHA7VZICSyh47NdwBebMaWjb
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GrNx5CSDli5Rrm7PKnqVD+O0SmnXm9Xjlt/7y6/wGzGCm0avjZkEu+tygpEH/IA9
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10ufVxYDhv6vPF2mDd0Mwx4x108PFVxkkGba2aN8o7m4aRa8Fg/tqN97S09NVqgQ
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wI4wdAXceN0irSiIHW9bCis9DMKM0Dxyf7+9WBJRXYRr5b4dHRLdHaGJ30Jiz7Yf
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T1ukntAVJotDZfqCVWiJJNP/zwlHyLAVqbizFfqtz1YxXeKo03nENAN4HazDI9Ch
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LqagQFuSswP9NLszqwSD4Xc9h71y+mubwcrdLTYd07lLLH2RLikNQDCfA2OrEkaP
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Wo9Fp7Few9csDwUnnojVxltqbV/WZ+a++tZMvj4oPNpf6Vy1F+UGUlXVbQFjxVyC
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ZQt0H+Df3PbqlC+hz+IgOW+qbz4ikcTpJdGtyfSGZH1+3qAJYYFEpY/ONamwhxjZ
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e26FocCJyKQ7JSmNxtta
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=Tmm9
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-----END PGP SIGNATURE-----
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