On 12 January 2012 19:47, Florian Fainelli <flor...@openwrt.org> wrote: >>> Although I've done this on ramips platform and didn't face any issues >>> I think that, potentially, a better source or entropy would be radio >>> noise. Of cause if it's possible to get. >>> >> As network traffic from cable, radio noise could be sniffed, on the radio >> case even without physical access. >> So that may not be better, maybe even worst. > > > Sure you can sniff noise, but you won't see the same noise as a sniffer than > as a receiver using it for entropy anyway due to the nature of the physical > medium. > --
I agree with Florian, you'll most likely have completely different noise on the sniffer 10 meters away from your attack target. It also depends on radio circuit which will probably be different on the sniffer. And even if you'll take the same device for sniffing it's very difficult to have two completely identical radios. As far as I know (from radio engineers I've talked to) every radio is unique (and this is the reason why you need to calibrate every device). The best noise source would probably be radial mse parameter which will include radio noise and circuit noise. So, potentially, it's even better than hardware random generators (which take only circuit noise). I didn't look into the wireless drivers yet but mse should be pretty standard value and should be available in most socs. Regards, Roman _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
