[Cryptech Tech] [Cryptech Core] alpha board paper sketch

[Peter Gutmann]

=?ISO-8859-1?Q?Joachim_Str=F6mbergson?= <joachim at secworks.se> writes:
>Peter Stuge wrote:
>> Why is CPU allowed to send *data* to tamper detector? I would expect=20
>> one or more discrete signals instead.
>
>The possibility to ask the Tamper detect more info and for development
>purposes.

Another possibility with active tamper-detection is to send a crypto-checksum
data pulse down a fibre-optic link every few tens of ms and verify its arrival
at the other end.  This makes an attempt to sever the link by an attacker
detectable.

Peter.