[Cryptech Tech] Lattice boards for developing a custom master key memory

[Joachim Strömbergson]

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Aloha!

As you might have seen here previously, we have discussed building our
own tamper protected master key memory. The idea is to use a tiny, low
power FPGA. The FPGA contains logic needed to implement:

1. Interface to the main FPGA. Currently SPI, but consider UART.

2. Storage of a master key with logic for anti-remanence (controlled
periodic bit flipping.

3. Fast (ns) key erasure when detecting an event on an external input.

We are currently considering using the Lattice ICE devices. One of the
chief reasons is the project IceStorm by Clifford stoll.

http://www.clifford.at/icestorm/

With the tool flow in Icestorm we should be able to show that the secure
storage and protection of the "crown jewels", the master key does not
rely on the implicit trust of proprietary tools and black box device
features.

I'm considering buying one of the following boards. Neither of them are
expensive. Both should have ample resources for what we intend to do.
The question is more which one is easiest to interface to the Cryptech
Alpha board for testing. Unless I'm missing some important detail.

http://www.latticesemi.com/icestick
http://www.latticesemi.com/en/Products/DevelopmentBoardsAndKits/iCE40HX8KBreakoutBoard.aspx

If you have any suggestions, comments, feedback I would appreciate them.

- -- 
Med vänlig hälsning, Yours

Joachim Strömbergson - Assured AB
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