Dean, My apologies if I have come in late to this discussion but I too have been looking at data payloads and cryptographic techniques and I am wondering why the AES engine in the STM32 device is not applied , the only limitation is that it works on 128 or 256 bit packets. However form there standard cryptographic techniques can be applied for enhancing the security and integrity of the data stream.
Regards Eric On 2016-08-27 22:52, Dean Hall wrote: > I read an academic paper in the past 5 years (can't cite it off the top of my > head, though) that performed cryptographic authentication of streaming data > in the following manner. > > Streaming Data : > [ > [Payload 0][SigByte 0] > [Payload 1][SigByte 1] > [Payload 2][SigByte 2] > ... > [Payload N][SigByte N] > ] > > Where > 256 < Sizeof(Payload) < 1024 > and > SigByte N := LeastSignificantByte( CryptographicSignature( Payload N )) > > Each transmission frame (or maybe a superframe) has one byte of signature. By > itself, one byte of authentication is not very trustworthy. But as N becomes > large, the trust of the streaming signature becomes strong. In other words, > if you do this over 64 payloads or more, it's good enough for amateur > purposes. > > !!Dean > KC4KSU > > On Aug 27, 2016, at 11:18 AM, Steve wrote: > >> That provides a second problem. What to do with an extra 63 bits? Not quite >> enough for 6 bit amateur callsign routing, but I'm sure there is a lot of >> ideas out there. 73/steve >> ------------------------------------------------------------------------------ >> _______________________________________________ Freetel-codec2 mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/freetel-codec2 [1] > > ------------------------------------------------------------------------------ > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 [1] Links: ------ [1] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
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