The Zcash Basis is happy to announce the discharge of FROST v2.0.0. This launch contains plenty of necessary modifications and enhancements to the FROST reference implementation.
The discharge introduces some breaking modifications, motivated both by the purpose of simplifying the API or to handle points. Specifically, we modified the deserialization of elliptic curve factors (Factor) to return an error; this was on account of a requirement within the FROST specification to verify that the identification will not be being serialized or de-serialised and returning an error if that’s the case. This requirement was not being adopted in earlier variations of the FROST reference implementation. We aren’t conscious of any doable safety points that may very well be brought on by this; nevertheless, we take into account this variation the correct factor to do as a defense-in-depth mechanism. Due to Jason Huang for reporting this problem.
One other necessary breaking change is simplifications to serialization and deserialization of structs that wrapped Scalar or Components. This permits changing code that seemed like X::deserialize(bytes.try_into().unwrap()) into X::deserialize(&bytes), which is far easier.
There are another smaller breaking modifications that are documented within the CHANGELOG.
Now we have added plenty of new options reminiscent of refresh share performance within the Trusted Supplier situation and a brand new verify_signature_share() perform in frost-core which permits verifying particular person signature shares. The identical performance for Distributed Key Era is being developed and will probably be included in a future launch.
This launch additionally provides no-std help to all crates besides frost-ed448. This permits the utilization of the crates in restricted environments reminiscent of embedded gadgets. Consult with the CHANGELOG for particulars.
Now we have additionally made plenty of enhancements to our documentation, together with updates and enhancements to the FROST demo documentation.
You possibly can see a full copy of the entire included modifications within the v2.0.0 Launch Notes on GitHub. Due to StackOverflowExcept1on for his or her a number of contributions.
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