tfhe-rs/tfhe/docs/fhe-computation/compute/configure-and-generate-keys.md

Configuration and key generation

This document explains how to initialize the configuration and generate keys.

The configuration specifies the selected data types and their custom crypto-parameters. You should only use custom parameters for advanced usage and/or testing.

To create a configuration, use the ConfigBuilder type. The following example shows the setup using 8-bit unsigned integers with default parameters. Additionally, ensure the integers feature is enabled, as indicated in the table on this page.

The configuration is initialized by creating a builder with all types deactivated. Then, the integer types with default parameters are activated, for using FheUint8 values.

use tfhe::{ConfigBuilder, generate_keys};

fn main() {
    let config = ConfigBuilder::default().build();


    let (client_key, server_key) = generate_keys(config);
}

The generate_keys command returns a client key and a server key:

• Client_key: this key should remain private and never leave the client.
• Server_key: this key can be public and sent to a server to enable FHE computations.