I think this is the right way forward. It looks like the phase lock on the clock is predictable. Let me know if I can help in any way :)
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If you could provide a patch for libhydrogen, that would be awesome.
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I'm going to guess that was to Mark, b/c it'd take me a while. I should start learning more crypto impl dev.https://github.com/jedisct1/libhydrogen/blob/master/impl/random.h …
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If you have platforms to test stuff on, then that would also be very useful :D
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I've thought it'd be cool to combine your ESP32 LoraChat w/ Codec2 700C (audio codec) & LibHydrogen, for secure PTT.https://github.com/blanu/codec2-arduino …
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Thinking on it, the ESP32 has an HSM, as it happens, would need to check how the RNG works and wheter libhydrogen has the imports for it :D
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Would b another useful source to blend in. Regarding Codec2, I've only seen it ported to Cortex M4F. Eg
@blanu ran on Adafruit Feather nRF521 reply 0 retweets 1 like -
Replying to @dlmetcalf @LargeCardinal and
Teensy 3.5 maybe another option. Perhaps w/ SGTL5000 to pre/post process audio if wanted really clean sound. Getting $$ cf a bare ESP32 tho!
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Replying to @dlmetcalf @LargeCardinal and
The audio quality achieved from just 700 bit/s is impressive enuf that using M4F might be justifiable &
@davidgrowe67's still improving it!1 reply 0 retweets 1 like -
Replying to @dlmetcalf @LargeCardinal and
Could even use as BT headset doing gimli crypto & 700c onboard (authN PSKs on µSD), with ESP32+sx1276 as repeater (eg freestanding on mast).
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That would be very very very cool.
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