Comments (3)
I implemented a VRF using Ristretto in https://github.com/w3f/schnorrkel/blob/master/src/vrf.rs for use in Polkadot.
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@burdges cool! curve25519-dalek is nice to use, right? :)
Does your implementation support signature aggregation?
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Yes. I quite like the dalek ecosystem. :)
Afaik, there is no third-party aggregation per se without pairings, but schnorrkel's VRF permits signers to produce a single proof of multiple VRF outputs' correctness. We might use this to permit block producers to produce compact proofs of when they did an did not win blocks. This batching is implemented in the vrfs_merge*
methods and uses the same as technique as used by CloudFlare's PrivacyPass: https://blog.cloudflare.com/privacy-pass-the-math/#dleqproofs
We also support batch verification similar to Schnorr/Ed25519 batch verification, although it should be further optimized into only having one multi-scalar exponentiation equation, instead of two.
Right now, it does not do verifiable shuffles, multi-secret same-signer VRFs, or multi-party VRFs, but..
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Related Issues (20)
- DID / DPKI integration HOT 5
- Suggested clarification on "Biscuit is a bearer token" HOT 2
- fix authorizer serialization
- check all / check unless behaviour HOT 3
- Question regarding the language specification about Sets HOT 2
- separate v2 and v3 samples HOT 1
- specify operator precedence
- Date & time manipulation
- indicate clearly that URL safe base64 encoding is preferred HOT 1
- Laziness of boolean operators HOT 3
- Heterogeneous `==` HOT 1
- Dates: TAI64, TAI or UTC? HOT 2
- Purpose of the `Parens` op HOT 2
- `.type()` function
- Add array and map types HOT 1
- Biscuit web key sets HOT 7
- Forgotten symbol in samples.json? HOT 2
- Webauthn signatures
- Allow heterogeneous sets
- `reject if` HOT 4
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