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github.com/divviup/libprio-rs @0.18.0

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1,032 symbols 3,087 edges 41 files 241 documented · 23% ● updated 5d agov0.18.1-alpha.3 · 2026-03-16★ 12218 open issues

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README

libprio-rs

Pure Rust implementation of Prio, a system for Private, Robust, and Scalable Computation of Aggregate Statistics.

Exposure Notifications Private Analytics

Prior versions of this crate were used in the Exposure Notifications Private Analytics system. This is referred to in various places as Prio v2. See prio-server or the ENPA whitepaper for more details.

Verifiable Distributed Aggregation Function

This crate implements a Verifiable Distributed Aggregation Function (VDAF) called "Prio3", implemented in the vdaf module, allowing Prio to be used in the Distributed Aggregation Protocol protocol being developed in the PPM working group at the IETF. This support is still evolving along with the DAP and VDAF specifications.

Draft versions and release branches

The main branch is under continuous development and will sometimes be partway between VDAF drafts. libprio uses stable release branches to maintain implementations of different VDAF draft versions. Crate prio version x.y.z is released from a corresponding release/x.y branch. We try to maintain Rust SemVer compatibility, meaning that API breaks only happen on minor version increases (e.g., 0.10 to 0.11).

Crate version	Git branch	VDAF draft version	DAP draft version	Conforms to specification?	Status
0.8	`release/0.8`	`draft-irtf-cfrg-vdaf-01`	`draft-ietf-ppm-dap-01`	Yes	Unmaintained as of March 28, 2023
0.9	`release/0.9`	`draft-irtf-cfrg-vdaf-03`	`draft-ietf-ppm-dap-02` and `draft-ietf-ppm-dap-03`	Yes	Unmaintained as of September 22, 2022
0.10	`release/0.10`	`draft-irtf-cfrg-vdaf-03`	`draft-ietf-ppm-dap-02` and `draft-ietf-ppm-dap-03`	Yes	Unmaintained as of November 14, 2023
0.11	`release/0.11`	`draft-irtf-cfrg-vdaf-04`	N/A	Yes	Unmaintained
0.12	`release/0.12`	`draft-irtf-cfrg-vdaf-05`	`draft-ietf-ppm-dap-04`	Yes	Unmaintained as of June 24, 2024
0.13	`release/0.13`	`draft-irtf-cfrg-vdaf-06`	`draft-ietf-ppm-dap-05`	Yes	Unmaintained
0.14	`release/0.14`	`draft-irtf-cfrg-vdaf-06`	`draft-ietf-ppm-dap-05`	Yes	Unmaintained
0.15	`release/0.15`	`draft-irtf-cfrg-vdaf-07`	`draft-ietf-ppm-dap-07`	Yes	Unmaintained as of June 24, 2024
0.16	`release/0.16`	`draft-irtf-cfrg-vdaf-08`	`draft-ietf-ppm-dap-09`	Yes	Supported
0.17	`release/0.17`	`draft-irtf-cfrg-vdaf-13`	`draft-ietf-ppm-dap-13`	Yes	Supported
0.18	`main`	`draft-irtf-cfrg-vdaf-15` (forthcoming)	`draft-ietf-ppm-dap-16` (forthcoming)	No	Supported

Cargo Features

This crate defines the following feature flags:

Name	Default feature?	Description	Semver stable?
`crypto-dependencies`	Yes	Enables dependencies on various RustCrypto crates, and uses them to implement `XofTurboShake128` to support VDAFs.	✅
`experimental`	No	Certain experimental APIs are guarded by this feature.	❌
`multithreaded`	No	Enables certain Prio3 VDAF implementations that use `rayon` for parallelization of gadget evaluations.	✅
`test-util`	No	Enables test utilities for VDAF users and VDAF implementers.	❌
`wasm-compat`	No	Enables the `getrandom/js` feature. This is necessary for `wasm32-unknown-unknown` targets, when in a JavaScript environment.	✅

Features that are not marked as "Semver stable" may undergo breaking changes in future patch releases, as an exception to semantic versioning.

Extension points exported contracts — how you extend this code

Decode (Interface)

Describes how to decode an object from a byte sequence. [20 implementers]

src/codec.rs

Flp (Interface)

The FLP proof system. Implementors specify the validity circuit. [9 implementers]

src/flp.rs

Client (Interface)

The Client's role in the execution of a VDAF. [5 implementers]

src/vdaf.rs

IdpfValue (Interface)

Trait for values to be programmed into an IDPF. Values must form an Abelian group, so that they can be secret-shared, a [5 …

src/idpf.rs

Integer (Interface)

An integer type that accompanies a finite field. Integers and field elements may be converted back and forth via the nat [4 …

src/field.rs

Xof (Interface)

An extendable output function (XOF) with the interface specified in [[draft-irtf-cfrg-vdaf-08]]. [draft-irtf-cfrg-vdaf- [3 …

src/vdaf/xof.rs

Word (Interface)

`Word` is the datatype used for storing and operating with field elements. The types `u32`, `u64`, and `u128` implement [3 …

src/fp/ops.rs

CompatibleFloat (Interface)

Assign a `Float` type to this type and describe how to represent this type as an integer of the given field, and how to [3 …

src/flp/types/fixedpoint_l2/compatible_float.rs

Core symbols most depended-on inside this repo

Shape

Method 448

Function 398

Class 120

Interface 38

Enum 28

Languages

Rust100%

Modules by API surface

src/vdaf/poplar1.rs78 symbols

src/idpf.rs78 symbols

src/vdaf/prio3.rs77 symbols

src/vdaf/mastic.rs57 symbols

src/vidpf.rs56 symbols

src/codec.rs51 symbols

src/flp.rs45 symbols

src/vdaf/xof.rs42 symbols

src/field.rs42 symbols

src/flp/types.rs39 symbols

src/vdaf/mastic/szk.rs37 symbols

src/vdaf/dummy.rs36 symbols

For agents

$ claude mcp add libprio-rs \
  -- python -m otcore.mcp_server <graph>

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