coleleavitt/opaque-lattice
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8d58a39c3b5ca0e6e8e99e5ea040549772a34c8d
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3 Commits

Author SHA1 Message Date
Cole Leavitt
8d58a39c3b feat(oprf): add LEAP-style truly unlinkable OPRF with commit-challenge protocol 
- Implement commit-challenge protocol to prevent fingerprint attack
- Use Learning With Rounding (LWR) instead of reconciliation helpers
- Add mathematical analysis document (docs/LEAP_ANALYSIS.md)
- 8 new tests, 197 total tests passing
- Benchmark: ~108µs (102x faster than OT-based, truly unlinkable)

The key insight: client commits to r BEFORE server sends challenge ρ,
so server cannot predict H(r||ρ) to extract A·s+e fingerprint.
 2026-01-07 12:36:44 -07:00
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
Cole Leavitt
dfa968ec7d initial 2026-01-06 12:49:26 -07:00