Cole Leavitt f022aeefd6 feat(oprf): add split-blinding unlinkable OPRF (partial unlinkability) ...

- Implement split-blinding protocol with C, C_r dual evaluation
- Add 7 security proof tests for unlinkability properties
- Add benchmarks: ~101µs (109x faster than OT-based)
- Note: Server can compute C - C_r fingerprint (documented limitation)

2026-01-07 12:29:15 -07:00

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