[Cryptography] USB firewall/condom HW/SW

[Ron Garret]

On Mar 13, 2017, at 6:32 AM, Dave Horsfall <dave at horsfall.org> wrote:

> On Sun, 12 Mar 2017, Henry Baker wrote:
> 
> [...]
> 
>> Any thoughts?
> 
> Only the meta-question of why should we trust it in turn...
> 
> Having the source code is no guarantee; look at Ken Thompson's famous
> paper "Reflections on trusting trust" some time.  It's a seminal paper
> that really ought to be mentioned again and again.

There is a defense against the TT attack.

https://www.schneier.com/blog/archives/2006/01/countering_trus.html

A more difficult problem is how do you know you can trust the STM32F4 processor.

rg