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# Powers of Tau Attestation

Author: devrandom
Date: 16 March 2018

Notes:

This is my second participation.

* Hardware is a Rock64 single board computer that has been purchased online
this week.  I never connected it to any network.
* OS was a somewhat older ayufan Debian Jessie minimal distribution
obtained from
https://github.com/ayufan-rock64/linux-build/releases/tag/0.5.15.
    c9e8f3f7304cab569ab5c0be9fd72897eb76103d2fb8089cf64b2239fa740262
jessie-minimal-rock64-0.5.15-136-arm64.img.xz
* Compute binary was compiled on another ARM64 device.  The binary
sha256sum is
7af00728c651f6c0fe77eb8863dd9638f72232b9aaaf8facb5676999111ed7c9.  The
binary was archived for future research.
* The boot drive was on an SD card.  The Jessie distribution was downloaded
and imaged on the SD card and then archived.
* The challenge was copied to the device using an sdcard connected through
a Transcend SD card adapter
* Additional entropy was injected into /dev/random via keyboard mashing and
dice throws with `stty -echo`
* The device was on a UPS which was disconnected from AC throughout the
computation
* The device was connected to a display and keyboard during the computation
* No swap was configured

The BLAKE2b hash is:

    2917a39f a4dc45d9 61a8e72c 4e2e20e5
    f842c6a8 876d91f3 167aa41b ed2c8251
    dca1077d 9903ec2d 313bfcef 8808a425
    ccabe63c 4adb91e7 9d3e624f dfb7a6ac
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