Encryption and decryption

I thinks you should first understand the basic concept of Encryption and Decryption Algorithm
Ex. Learn more about RSA, MD5 algorithms ie how these algorithms work Theoretically then implement in any Lang(C#,F#,VB.net,J#)


Link : http://www.di-mgt.com.au/rsa_alg.html[^]


http://en.wikipedia.org/wiki/RSA_(algorithm)[^]

Hi,

I think this article can help you:
Public Key RSA Encryption in C# .NET[^]

1st write this function on your page:

public static string ConvertToBin(string asciiString)
   {
       StringBuilder sb = new StringBuilder();
       foreach (string letter in asciiString.Select(c => Convert.ToString(c, 8)))
       {
           sb.Append(letter);
       }
       return sb.ToString().Substring(0,5);
   }

then write this coding where u want to show ur encrypt key like textbox means write like this it show 5 digit encrypt key:

TextBox1.Text = ConvertToBin(a);
TextBox2.Text = ConvertToBin(content.Substring(content.Length - 5, 5)); RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
TextBox3.Text = ConvertToBin(rsa.ToXmlString(true).Substring(15, 5));
TextBox4.Text = ConvertToBin(rsa.ToXmlString(true).Substring(15, 5));
TextBox5.Text = ConvertToBin(rsa.ToXmlString(true).Substring(22, 5));
TextBox6.Text = content;