[Cryptech Tech] field upgrade

[Fredrik Thulin]

On Thursday, May 05, 2016 07:38:56 AM Basil Dolmatov wrote:
> 
> dol@ с iPad
> 
> > 5 мая 2016 г., в 1:00, Paul Selkirk <paul at psgd.org> написал(а):
> > 
> > During yesterday's meeting, Fredrik, Pavel, and I brainstormed DFU for
> > the ARM.
> > 
> > 
> > Since upgrade requires opening the case and inserting jumpers, by
> > definition this tampers the device, and the user has to generate a new
> > master key and re-load any externally-generated keys. That's probably
> > obvious, but I wanted to state it explicitly.
> > 
> > 
> If as a term "master key" is referring to a technological key, which is used 
for enciphering other keys in the board key storage, then OK (provided there 
is escrow technology and procedure for other keys bidirectional transfer).
>
> Considering the board being in ALPHA stage, one can expect as bug fix 
releases of firmware, as well as feature releases, so software upgrade process 
should not be considered as extraordinary and should not disrupt device 
operation with long-term keys 

Agree. On the Alpha board, the tamper protection won't actually be triggered 
by opening the case - one has to press the PANIC button too.

/Fredrik
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