The Zcash Basis is happy to announce the discharge of FROST v2.0.0. This launch contains quite a few necessary modifications and enhancements to the FROST reference implementation.
The discharge introduces some breaking modifications, motivated both by the objective of simplifying the API or to handle points. Specifically, we modified the deserialization of elliptic curve factors (Aspect) to return an error; this was attributable to a requirement within the FROST specification to examine that the identification shouldn’t 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’re not conscious of any doable safety points that could possibly be brought on by this; nonetheless, we contemplate this transformation the suitable factor to do as a defense-in-depth mechanism. Because of Jason Huang for reporting this concern.
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 way easier.
There are another smaller breaking modifications that are documented within the CHANGELOG.
We’ve got added quite a few new options comparable to refresh share performance within the Trusted Supplier state of affairs and a brand new verify_signature_share() perform in frost-core which permits verifying particular person signature shares. The identical performance for Distributed Key Technology is being developed and might 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 comparable to embedded gadgets. Confer with the CHANGELOG for particulars.
We’ve got additionally made quite a few enhancements to our documentation, together with updates and enhancements to the FROST demo documentation.
You may see a full copy of all the included modifications within the v2.0.0 Launch Notes on GitHub. Because of StackOverflowExcept1on for his or her a number of contributions.
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