CS_Crypto_Seminary1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {

            RSACryptoServiceProvider myRSA = new RSACryptoServiceProvider(2048);

            AesManaged  myAES = new AesManaged();
            byte    [] RSAciphertext;
            byte    [] plaintext;
            //generate an AES key
            double t0 = DateTime.Now.Ticks;
            for (int i = 0; i < 10; i++)
            {
                myAES.GenerateKey();
            }
            double t00 = DateTime.Now.Ticks - t0;
            Console.WriteLine("Generate time=" + t00/100000);
            //encrypt an AES key with RSA
            double t1 = DateTime.Now.Ticks;
            RSAciphertext = myRSA.Encrypt(myAES.Key,true);
            double t2 = DateTime.Now.Ticks- t1;
            Console.WriteLine("Encrypt time=" + t2/10000);
            //decrypt and recover the AES key
            double t3 = DateTime.Now.Ticks;
            for (int i = 0; i < 100; i++)
            {
                myAES.GenerateKey();
                plaintext = myRSA.Decrypt(RSAciphertext, true);
            }
            double t4 =  DateTime.Now.Ticks - t3;
            Console.WriteLine("Decrypt time=" + t4/1000000);
            Console.ReadLine();

        }
    }
}