-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

# Powers of Tau Attestation

Author: devrandom
Date: 12 March 2018

Notes:

* Hardware is an Intel laptop that has not been powered up in four years
and has never been connected to a network after it was purchased.  CPU was
a Celeron 1007U.  Wireless card was removed.
* OS was a clean Ubuntu 14.04
* Compute binary was created with a deterministic Gitian build, with report
here:
https://github.com/devrandom/golang-powersoftau/commit/241da6dac6166a68ff20ef7abbb0f8231a626a3c.
The binary sha256sum is
c28894877c8948960eaefa0d8f35da6c911031980672b983f361711a7dcb1ec8.  The
binary was archived for future research.
* A USB drive was purchased in person and used to transfer the binary and
challenge into the laptop and the response out of the laptop.
* Additional entropy was injected into /dev/random via keyboard mashing and
dice throws
* The laptop was disconnected from AC throughout the computation
* The boot drive was destroyed

The BLAKE2b hash is:

    a449bc6e d77cbc7b 2d6aa91b ac4ddc6e
    e398a6e8 6c2b08dd 529b796b f7fcfb7c
    ba5cfb94 a394731d e1a188ec bdf6dcaf
    8444f688 975973ca 079b94f2 e0e7def0

-----BEGIN PGP SIGNATURE-----

iQEcBAEBCAAGBQJaqB0pAAoJEOOqsosn9c9K66MH/j79TuEGpSdS5weTRxKHVMHJ
NMLEGdnFT6BVEIJrIbzC1eQFJHWQhROokTn0mrjaV3lsGSWXJ5D91/rYE6boVsrN
o501eDQui1nSnkIICrQY3aDnzYIT98crtGPDBD29e8vTRqjGnWAay1ovjIA5Vr0V
q3nxfrp2mqdk9kYFHDfLvjfeEJRkOujx1TrwRRqX2/0OTLnAnPgrqUncKaiojH0v
IlcbYAoBe2VEboiwN1QDMV0AuYzNCfrTXsof0lU6g7sZwy49MLCQNsUmxW2bl3jz
AzlCjcBG6EyLyh5T6J+FylEYrplcPdlZLmtcGNsdoM1VeohpL3f7ZqALUlCJjQU=
=IvmM
-----END PGP SIGNATURE-----