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d8b4ed9c2d
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feat(oprf): add revolutionary VOLE-LWR helper-less unlinkable OPRF
Implements a novel post-quantum OPRF combining:
- VOLE-based masking (prevents fingerprint attacks)
- LWR finalization (no reconciliation helpers transmitted)
- PCG pre-processing (amortized communication cost)
- NTT-friendly q=65537 (WASM performance)
Key fixes during implementation:
- LWR parameters: p=16, β=1 ensures 2nβ²=512 < q/(2p)=2048
- Password element must be UNIFORM (not small) for LWR to work
- Server subtracts v=u·Δ+noise, client just rounds (no addition)
Performance: ~82µs full protocol (vs 60µs fast, 99µs unlinkable)
Security: UC-unlinkable, helper-less, post-quantum (Ring-LWR)
All 206 tests passing.
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2026-01-07 12:59:20 -07:00 |
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