Illustrates asymmetric cryptography : File Cryptography : File Stream C# Source Code

    

/*
Mastering Visual C# .NET
by Jason Price, Mike Gunderloy

Publisher: Sybex;
ISBN: 0782129110
*/

/*
  Example19_11.cs illustrates asymmetric cryptography
*/

using System;
using System.IO;
using System.Security.Cryptography;

public class Example19_11 
{
    public static void Main() 
    {

        // Create a new crypto provider
        RSACryptoServiceProvider rsa = 
            new RSACryptoServiceProvider();

        // Data to encrypt
        Byte[] testData = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

        // Encrypt the data
        Byte[] encryptedData = rsa.Encrypt(testData, false);
        Console.WriteLine("Encrypted data:");
        for(int i=0; i<encryptedData.GetLength(0); i++)
        {
            Console.Write("{0} ", encryptedData[i]);
        }
        Console.WriteLine();

        // Decrypt the data
        Byte[] decryptedData = rsa.Decrypt(encryptedData, false);
        Console.WriteLine("Decrypted Data:");
        for(int i=0; i<decryptedData.GetLength(0); i++)
        {
            Console.Write("{0} ", decryptedData[i]);
        }
        Console.WriteLine();
    }

}