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sealdemo_performance.cpp
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sealdemo_performance.cpp
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#include "seal/seal.h"
#include "/home/tanya/SEAL/native/examples/examples.h" //安装SEAL库后，导入其路径下的文件SEAL/native/examples/examples.h
#include <iostream>
#include<stdlib.h>
#include<time.h>
#define random(x) (rand()%x)
using namespace std;
using namespace seal;
int main()
{
/** 初始化加密参数
* 选定多项式模数
* 选定系数模数
* 选定噪声模数
*/
chrono::high_resolution_clock::time_point time_start, time_end;
chrono::microseconds time_diff;
EncryptionParameters parms(scheme_type::BFV);
size_t poly_modulus_degree =2048;
parms.set_poly_modulus_degree(poly_modulus_degree);
parms.set_coeff_modulus(CoeffModulus::BFVDefault(poly_modulus_degree));
parms.set_plain_modulus(2);
auto context = SEALContext::Create(parms);
print_parameters(context);
cout << endl;
/** 各种生成器初始化
* 生成公私钥对
*/
time_start = chrono::high_resolution_clock::now();
KeyGenerator keygen(context);
PublicKey public_key = keygen.public_key();
SecretKey secret_key = keygen.secret_key();
time_end = chrono::high_resolution_clock::now();
time_diff = chrono::duration_cast<chrono::microseconds>(time_end - time_start);
cout << "Key generation time:" << time_diff.count() << " microseconds" << endl;
Encryptor encryptor(context, public_key);
Evaluator evaluator(context);
Decryptor decryptor(context, secret_key);
IntegerEncoder encoder(context);
/** 根据加密参数初始化编码器
* 将数字编码成多项式
*/
srand((int)time(0));
int data = random(100);
cout << "-----data: " << data << "-----"<< endl;
time_start = chrono::high_resolution_clock::now();
Plaintext plain1 = encoder.encode(data);
time_end = chrono::high_resolution_clock::now();
time_diff = chrono::duration_cast<chrono::microseconds>(time_end - time_start);
cout << "encoding time:" << time_diff.count() << " microseconds" << endl;
/** 根据加密参数初始化加密器
* 将多项式加密
*/
Ciphertext encrypted1;
time_start = chrono::high_resolution_clock::now();
encryptor.encrypt(plain1, encrypted1);
time_end = chrono::high_resolution_clock::now();
time_diff = chrono::duration_cast<chrono::microseconds>(time_end - time_start);
cout << "encryption time:" << time_diff.count() << " microseconds" << endl;
/** 根据加密参数初始化运算器
* 在密文多项式上进行运算
* 取负 - nagate
* 求和 - add
* 求差 - sub
* 求积 - mutiply
*/
Ciphertext encrypted_result1;
time_start = chrono::high_resolution_clock::now();
evaluator.negate(encrypted1, encrypted_result1);
time_end = chrono::high_resolution_clock::now();
time_diff = chrono::duration_cast<chrono::microseconds>(time_end - time_start);
cout << "negate time:" << time_diff.count() << " microseconds" << endl;
time_start = chrono::high_resolution_clock::now();
evaluator.square(encrypted1, encrypted_result1);
time_end = chrono::high_resolution_clock::now();
time_diff = chrono::duration_cast<chrono::microseconds>(time_end - time_start);
cout << "square time:" << time_diff.count() << " microseconds" << endl;
time_start = chrono::high_resolution_clock::now();
evaluator.multiply(encrypted1, encrypted1,encrypted_result1);
time_end = chrono::high_resolution_clock::now();
time_diff = chrono::duration_cast<chrono::microseconds>(time_end - time_start);
cout << "multplication time:" << time_diff.count() << " microseconds" << endl;
time_start = chrono::high_resolution_clock::now();
evaluator.add(encrypted1, encrypted1,encrypted_result1);
time_end = chrono::high_resolution_clock::now();
time_diff = chrono::duration_cast<chrono::microseconds>(time_end - time_start);
cout << "addition time:" << time_diff.count() << " microseconds" << endl;
time_start = chrono::high_resolution_clock::now();
evaluator.sub_inplace(encrypted_result1, encrypted1);
time_end = chrono::high_resolution_clock::now();
time_diff = chrono::duration_cast<chrono::microseconds>(time_end - time_start);
cout << "substract time:" << time_diff.count() << " microseconds" << endl;
Plaintext plain_result1;
time_start = chrono::high_resolution_clock::now();
decryptor.decrypt(encrypted_result1, plain_result1); //解密，存入plain_result
time_end = chrono::high_resolution_clock::now();
time_diff = chrono::duration_cast<chrono::microseconds>(time_end - time_start);
cout << "decryption time:" << time_diff.count() << " microseconds" << endl;
/** 调用之前生成的编码器解码
* 将明文多项式结果解码成数字
*/
time_start = chrono::high_resolution_clock::now();
int result = encoder.decode_int32(plain_result1);
time_end = chrono::high_resolution_clock::now();
time_diff = chrono::duration_cast<chrono::microseconds>(time_end - time_start);
cout << "decoding time:" << time_diff.count() << " microseconds" << endl;
cout << "-----result: " << result << "-----"<< endl;
return 0;
}