[Cryptography] N. Korean radio broadcasts string of random numbers
Dave Horsfall
dave at horsfall.org
Thu Sep 1 17:52:05 EDT 2016
On Tue, 30 Aug 2016, Bill Cox wrote:
> If by amateur radio, you mean [crypto over] ham radio, then I strongly
> recommend you do not do that. The FCC will be there in short order,
> though some hams I know say they don't show up soon enough.
In Australia at least, encryption via Amateur radio is legal for remote
control of repeaters, beacons, etc; I don't know about the rest of the
world. However, I have, cough cough, passed the occasional message using
PGP... Highly illegal, of course.
I had to switch off the local repeater VK2RWI when foul-mouthed idiots
were abusing it; knowing that I was being recorded by said idiots, I had
to change the lead-in code every so often (under Australian law, as the
repeater keeper I was held responsible for all traffic, and it was my duty
to switch it off). As I dimly recall, it was a 3-byte prefix (a massive
24 bits of security!), and I was going to use a rolling CRC-32 code, but I
never got around to it (it was a bit much for the Z-80 at both ends).
--
Dave Horsfall DTM (VK2KFU) "Those who don't understand security will suffer."
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