[wmf]

methods to generate a totally privacy-preserving form of internet native identification and Sybil resistance

I thought Stefan Brands solved this over 20 years ago without scanning people's eyes.

[convolvatron]

Stefan Brands, Frédéric Légaré: Digital Identity Management based on Digital Credentials. GI Jahrestagung 2002: 120-126

is that a good place to start?

[wmf]

I don't know. I have his book (which regrettably I have not actually opened).