[messaging] SafeSlinger's Ephemeral Fingerprint

[Michael Rogers]

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On 08/07/14 17:06, Michael Farb wrote:
> I think we can expect the availability and interoperability of
> more local wireless channels to improve over time. I'd love to see
> WiFi Direct supported in older devices to broaden its market share.
> The UX design to use all available wireless channels in some sort
> of massive discovery mode makes me shudder a little, but we need to
> do something for those who are getting their standard Internet data
> channels blocked.

Hi Michael,

We've experimented with using Bluetooth and wifi (infrastructure mode,
not WiFi Direct) for pairwise key exchange in Briar. Although I
haven't rigorously tested this, it seems that on some devices, the
discovery success rate is lower when using both Bluetooth and wifi
than with Bluetooth alone. I guess this could be due to interference
between the two radios, or the extra processing load causing timeouts
at some layer of the stack.

This paper describes some problems and workarounds for using WiFi
Direct and Bluetooth to connect Android devices:

http://www.sussex.ac.uk/Users/ianw/papers/chants13.pdf

Cheers,
Michael
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