On Thu, Apr 26, 2018 at 3:13 PM, Joachim Strömbergson < joachim.stromberg...@assured.se> wrote:
> -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 > > Aloha! > > Clifford Wolf, not Stoll. Sorry for the mixup. > > Joachim Strömbergson wrote: > > 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. > > > > _______________________________________________ Tech mailing list > > Tech@cryptech.is https://lists.cryptech.is/listinfo/tech > > - -- > Med vänlig hälsning, Yours > > Joachim Strömbergson - Assured AB > ======================================================================== > > -----BEGIN PGP SIGNATURE----- > Comment: GPGTools - http://gpgtools.org > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iQIcBAEBCAAGBQJa4dB6AAoJEF3cfFQkIuyNj84QAJ4/gQxnpU6eTmjZBmcT4S8G > eminpGXBthEo7pyO+wKNdd5y11SX04jvidVZxxWovBcxpp/gf8gGocGO5Nd/pgOZ > KuhoHe0UyZYI7zoFs09Wo6B0A99DnF/asIgzHDL8PlrmB9M2eZH6uPubVTpd8Mdf > G+YtISO8/QFdZhwNUEl9rV73E6keYPO89+O/nEr2X1eux4R7BmujoiEHPy2O5s3p > NsfLB5L/r3cwP0x5pKnckmbPfkwkei7ZYM1XfsQEBJ9exfPVvuQ4gSQAixQi5Plr > McPqca0uAybIfU+yH/puevPHq+oeq9K1nrdVzMwA9BES1r9qIbHraDQbDmoCT7i2 > GtKg5HXQsRgSbUhsUFOzfyHYmvvNgRzkGgYhWe+gN5THpvn5JzbfmfzRM/IlrRXQ > 6T1DtQYvkXVta4jViV+QSsTH79DeAGfNiClW9WyetFtOg/v5dkK3Qo6944oxVi9m > LWvuuKJFtb1QxvofpmYSNOf9NHRftzEMjAfApbHC5n8t2ZORxtehc1t5Ud4O+fsf > VPd7r9+ylxxJNEOhk53wdY2vMunYjPJ5zSmJwsFp/h67Bx/DbXgWFYA+uV4fqiXi > bwDOLgvNRGMA+d7L7BDaaLuRimAO1J9tX+fxOuc1N/k1bnIRWHdPqPlbIZOXFEtr > +M+bCxXvFP4DyTy3kZ/K > =tUhR > -----END PGP SIGNATURE----- > _______________________________________________ > Tech mailing list > Tech@cryptech.is > https://lists.cryptech.is/listinfo/tech > There's a ton of iCE40 boards coming out on the market, most of the small and cheap. I think Luke Valenty's TinyFPGA B2 board deserves a special mention (as well as the just crowd-funded BX model (for which I thought you were a backer (nested comments makes me feel like writing LISP code))). The main points of the B2 ( https://www.tindie.com/products/tinyfpga/tinyfpga-b2/) would be that it uses the Teensy form factor, which is pretty small but still usable for manual soldering. It also comes with a pure verilog FPGA bootloader which makes it easy to upload new bitstreams. The FPGA bootloader has of course FuseSoC support too :) //Olof
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