Re: [tor-dev] RFC on obfs3 pluggable transport

[Veggie Monster <vmonmoonshine@xxxxxxxxx>]

Hey Ian,

> [There's no such thing as a "bi-quadratic residue" in this setting; all
> quadratic residues in this group have one square root which is itself a
> quadratic residue and one which is not.]

I guess you are right. Because (q,2) = 1, all quadratic residues are
bi-quadratic residues, hence no meaningful distinction:

[vmon@telly biquad-attack]$ sage mount_attack.sage
Key oracle biquadratic residue ratio: 0.500503540039062
Random oracle biquadratic residue ratio: 0.496414184570312

[https://github.com/vmon/biquad-attack]

Thanks,
Vmon
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