Concrete 0.2.0 is the first version of the new Concrete Library. It is based on experimental features in concrete-core through the intermediate libraries (concrete-integer, concrete-shortint). It is published with a temporary dependency concrete-core-experimental. Future versions of Concrete 0.2 will be based on a public version of concrete-core.

Importing into your project

To use concrete in your project, you first need to add it as a dependency in your Cargo.toml:
concrete = { version = "0.2.0-beta", features = [ "booleans" ] }

Choosing your features

concrete exposes different cargo features to customize the types and features used.


concrete types
This crate exposes 3 kinds of data types. Each kind is enabled by activating its corresponding feature in the TOML line. Each kind may have multiple types:
Cargo Feature


By enabling the serde feature, the different data types and keys exposed by the crate can be serialized / deserialized.

Enabling all features.

Copy this if you would like to enable all features:
concrete = { version = "0.2.0-beta", features = [ "booleans", "shortints", "integers", "serde"] }

Supported platforms

As concrete relies on concrete-core, concrete is only supported on x86_64 Linux and x86_64 macOS.
Windows users can use concrete through the WSL.

Apple Silicon instructions

macOS users who have Apple Silicon (arm64) devices can use concrete by cross-compiling to x86_64 and running their program with Rosetta.
First, install the needed Rust toolchain:
# Install the macOS x86_64 toolchain (you only need to do this once)
rustup toolchain install --force-non-host stable-x86_64-apple-darwin
Then, you can either:
  • Manually specify the toolchain to use in each of the cargo commands:
For example:
cargo +stable-x86_64-apple-darwin build
cargo +stable-x86_64-apple-darwin test
  • Or override the toolchain to use for the current project:
rustup override set stable-x86_64-apple-darwin
# cargo will use the `stable-x86_64-apple-darwin` toolchain.
cargo build
To check the toolchain that Cargo will use by default, you can use the following command:
rustup show
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On this page
Importing into your project
Choosing your features
Enabling all features.
Supported platforms
Apple Silicon instructions