Compressing ciphertexts/keys

use tfhe::prelude::*;
use tfhe::{ConfigBuilder, generate_keys, set_server_key, CompressedFheUint16};

fn main() {
    let config = ConfigBuilder::default().build();
    let (client_key, _) = generate_keys(config);

    let clear = 12_837u16;
    let compressed = CompressedFheUint16::try_encrypt(clear, &client_key).unwrap();
    println!(
        "compressed size  : {}",
        bincode::serialize(&compressed).unwrap().len()
    );
    
    let decompressed = compressed.decompress();
    
    println!(
        "decompressed size: {}",
        bincode::serialize(&decompressed).unwrap().len()
    );

    let clear_decompressed: u16 = decompressed.decrypt(&client_key);
    assert_eq!(clear_decompressed, clear);
}

use tfhe::prelude::*;
use tfhe::{
    generate_keys, set_server_key, ClientKey, CompressedServerKey, ConfigBuilder, FheUint8,
};

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

    let cks = ClientKey::generate(config);
    let compressed_sks = CompressedServerKey::new(&cks);

    println!(
        "compressed size  : {}",
        bincode::serialize(&compressed_sks).unwrap().len()
    );

    let sks = compressed_sks.decompress();

    println!(
        "decompressed size: {}",
        bincode::serialize(&sks).unwrap().len()
    );

    set_server_key(sks);

    let clear_a = 12u8;
    let a = FheUint8::try_encrypt(clear_a, &cks).unwrap();

    let c = a + 234u8;
    let decrypted: u8 = c.decrypt(&cks);
    assert_eq!(decrypted, clear_a.wrapping_add(234));
}

use tfhe::prelude::*;
use tfhe::{ConfigBuilder, generate_keys, set_server_key, FheUint8, CompressedPublicKey};

fn main() {
    let config = ConfigBuilder::default().build();
    let (client_key, _) = generate_keys(config);

    let compressed_public_key = CompressedPublicKey::new(&client_key);

    println!("compressed size  : {}", bincode::serialize(&compressed_public_key).unwrap().len());

    let public_key = compressed_public_key.decompress();

    println!("decompressed size: {}", bincode::serialize(&public_key).unwrap().len());


    let a = FheUint8::try_encrypt(213u8, &public_key).unwrap();
    let clear: u8 = a.decrypt(&client_key);
    assert_eq!(clear, 213u8);
}

use tfhe::prelude::*;
use tfhe::{generate_keys, set_server_key, CompressedCompactPublicKey, ConfigBuilder, FheUint8};

fn main() {
    let config = ConfigBuilder::default()
        .use_custom_parameters(
            tfhe::shortint::parameters::PARAM_MESSAGE_2_CARRY_2_COMPACT_PK_KS_PBS,
            None,
        )
        .build();
    let (client_key, _) = generate_keys(config);

    let public_key_compressed = CompressedCompactPublicKey::new(&client_key);

    println!(
        "compressed size  : {}",
        bincode::serialize(&public_key_compressed).unwrap().len()
    );

    let public_key = public_key_compressed.decompress();

    println!(
        "decompressed size: {}",
        bincode::serialize(&public_key).unwrap().len()
    );

    let a = FheUint8::try_encrypt(255u8, &public_key).unwrap();
    let clear: u8 = a.decrypt(&client_key);
    assert_eq!(clear, 255u8);
}