Professor builds ring-signature protocol on a Tor hidden service for anonymous homework submissions

matthew_d_green · x · 2026-09-06

Matthew Green reveals the crypto behind his course submission system: a protocol using linkable ring signatures plus a Tor hidden service as a drop box, so submissions are verifiably authentic while students can prove they submitted without identifying their submission. Agents also write an ungraded, privacy-preserving report on what worked and what frustrated the student.

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