STM32 firmware for Cryptech Alpha board
=======================================

The Alpha board is our first full prototype for an open-source hardware
security module (HSM). It is a custom board with an STM32 Cortex-M4
microcontroller and an Artix-7 FPGA, flash-based keystore, separate memory
for the Key Encryption Key, etc. See the wiki for design documents.

Copyrights
==========

The license for all work done on this in the CrypTech project is a
3-clause BSD license.

The "Noise generator" and "Amplifier" parts of the circuit diagram are
copied from Benedikt Stockebrand's ARRGH project. 

Both copyright statements are included in LICENSE.txt.

Board Revisions
===============

1. `rev01` was the "dev-bridge" board, a daughterboard for the Novena,
   which talked to the Novena's FPGA through the high-speed expansion
   connector.

2. `rev02` is the Alpha board, our first full prototype for an open-source
   hardware security module (HSM). It is a custom board with an STM32
   Cortex-M4 microcontroller and an Artix-7 FPGA, flash-based keystore,
   separate memory for the Key Encryption Key, etc.

   The board's form factor (4 x 4 in, 101.6 x 101.6 mm) was based on the
   Intel NUC mini-PC, but there were some issues sourcing enough cases, so
   only a few of these boards were made.

3. `rev03` is functionally the same as `rev02`, but in a Eurocard form
   factor (100 x 120 mm, aka "3Ux120").