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Pls can anyone give me a source code for rsa algoritm in c# which encrypt & decrypt a file through code.means using StreamWriter function.that function which will give the file through code & create two files one is encrypted & other is decrypted file.
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Pavel Yermalovich 25-Mar-11 4:49am    
http://www.c-sharpcorner.com/UploadFile/ahsanshakir/EncryptFile12212006042816AM/EncryptFile.aspx
Pavel Yermalovich 25-Mar-11 4:50am    
And LEARN TO USE GOOGLE!!!
Sandeep Mewara 25-Mar-11 5:32am    
no effort.
Sergey Alexandrovich Kryukov 25-Mar-11 12:52pm    
Why do you think you need source code (not just code like Pavel shows)?
--SA

RSA encryption but just for strings:

using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
namespace RSA
{
    class Program
    {
        static void Main(string[] args)
        {

            RSACryptoServiceProvider myrsa = new RSACryptoServiceProvider();

            System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();//Encode String to Convert to Bytes

            string data = "RsA EnCryPTion is cool!!!";//whatever you want to encrypt
            
            Byte[] newdata = encoding.GetBytes(data);//convert to Bytes
                             
            Byte[] encrypted = myrsa.Encrypt(newdata, false);

            Console.WriteLine("Encrypted Data:  ");
            for (int i = 0; i < encrypted.Length; i++)
            {
                Console.Write("{0} ", encrypted[i]);
            }
            Console.WriteLine();
            Console.WriteLine();

            Byte[] decrypted = myrsa.Decrypt(encrypted, false);//decrypt 
            Console.WriteLine("Decrypted Data:  ");

            string dData = encoding.GetString(decrypted); //encode bytes back to string 
            for (int i = 0; i < decrypted.Length; i++)
            {
                Console.Write("{0}", dData[i]);
            }

        }
    }
}
 
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This is a common requirement and there are, therefore, thousands of articles/blogs on the internet.

All you have to do to find them is to think of a suitable search phrase and have access to a search engine.
 
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