[Cryptech Tech] Alpha board block diagram v0.001

[Basil Dolmatov]

dol@ с iPad

> 25 марта 2015 г., в 3:06, Joachim Strömbergson <joachim at secworks.se> написал(а):
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
> 
> Aloha!
> 
> Joachim Strömbergson wrote:
>> Павел Шатов wrote:
>>> I'm afraid, MAX3421E is not what we need. It is not a transceiver,
>>> it is a Peripheral/Host controller. It does have SPI interface,
>>> but this interface is used to communicate with its internal
>>> registers, not to communicate with external system. I believe, what
>>> we actually need is FT232R from FTDI or maybe CP2104 from SiLabs.
> 
> I've looked at the FT232R. One thing I don't like with the chip is that
> it has an EEPROM programmable from the host side. And changing values in
> the EEPROM affects the USB as well as the serial interface functionality.
> 
> The FT232H does not have internal EEPROM and is actually a simpler chip
> even though it supports UART as well as a few other serial interfaces
> (I2C, SPI or general FIFO). The performance is also a bit better when
> used as UART interface.

The simpler, the better, less possible attack vectors 
> 
> - -- 
> Med vänlig hälsning, Yours
> 
> Joachim Strömbergson - Alltid i harmonisk svängning.
> ========================================================================
> Joachim Strömbergson          Secworks AB          joachim at secworks.se
> ========================================================================
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG/MacGPG2 v2
> Comment: GPGTools - http://gpgtools.org
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
> 
> iQIcBAEBCAAGBQJVEmyQAAoJEF3cfFQkIuyNHboP/RBYFpuoJ8YF4i7r1RnDPh7G
> URdEftzlm17DA2TPMSHenQAItCHz6iZt949Y7rN9HT9QE3oGK3kpYwDPruIOQc1r
> JrijIcK46tDN7Q64k/spC77XN5Hodg1jaNiO4BvBJV7Bld3o+q1SBDpECMwghQ7S
> zxEs08sZf3rsxghhSuBzn3NIinUDAJSxC1kyT4ihYcE2i19MtZKcN9e6uWSEX+Qu
> 3V+kpRG5M/LqVqRiU5kLcEy2Qy5Ob5D2/O3tsMQyq2M/aAmkwO4zsbrMICT3vGBY
> T+ygixF5qlW1R7fLXWyQhqYiDyPWCbnTfpb12BkzgWk6d1R28gqB9VQGWwm17uXC
> qjb6F9JK3vAENXM67wIs8kefj6QeWzwU56zzQT9zHunl1WGvsOF4e9/zw4Ki4eb8
> qqVVaShXyHvowWQBXH4qbAXBzPzuRnzf9OXihTNfAkN6WRakJGNyxq8VgEnoGhFL
> wgQaXJYVeMNR9qmHxwCBM/7ltseiiO6KqXmiRDDTlAi2wSM7Q/m8iOQjhdCBPHiD
> 4vw+H96KbJkttfjVUrfLYJot5i8MhPTpjsKTfzJ2dRdwCzP6ornbIdEp6r7qDaMx
> lUyDopljPVMPZabLNjIwo4vfItMeYKDm5jNGr21yyRi3eaQI4y7dV1VNosXDQbI8
> l6rej4XQSYkYuZcb5HEs
> =L2Uy
> -----END PGP SIGNATURE-----
> _______________________________________________
> Tech mailing list
> Tech at cryptech.is
> https://lists.cryptech.is/listinfo/tech