Function first_phase

Utils/he-example.cpp:25–59

}

void first_phase(string filename, int n_mults, int circuit_sec)
{
    // specify number of multiplications (at most one) and function privacy parameter
    // increase the latter to accommodate more operations
    FHE_Params params(n_mults, circuit_sec);

    // generate parameters for computation modulo a 32-bit prime
    params.basic_generation_mod_prime(32);

    // find computation modulus (depends on parameter generation)
    cout << "computation modulo " << params.get_plaintext_modulus() << endl;

    // generate key pair
    FHE_KeyPair pair(params);
    pair.generate();

    Plaintext_mod_prime plaintext(params);

    // set first two plaintext slots
    plaintext.set_element(0, 4);
    plaintext.set_element(1, -1);

    // encrypt
    Ciphertext ciphertext = pair.pk.encrypt(plaintext);

    // store for second phase
    octetStream os;
    params.pack(os);
    pair.pk.pack(os);
    ciphertext.pack(os);
    plaintext.pack(os);
    pair.sk.pack(os);
    ofstream out(filename);
    os.output(out);
}

void second_phase(string filename)
{