Encrypt and Decrypt in C# asp.net

In this article I will explain how to encrypt and decrypt a string in ASP.Net.

Below are the functions for Encryption and Decryption which will be used for the Encrypting or Decrypting Username or Password.

private string Encrypt(string clearText)

{

    string EncryptionKey = "MAKV2SPBNI99212";

    byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);

    using (Aes encryptor = Aes.Create())

    {

        Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });

        encryptor.Key = pdb.GetBytes(32);

        encryptor.IV = pdb.GetBytes(16);

        using (MemoryStream ms = new MemoryStream())

        {

            using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))

            {

                cs.Write(clearBytes, 0, clearBytes.Length);

                cs.Close();

            }

            clearText = Convert.ToBase64String(ms.ToArray());

        }

    }

    return clearText;

}

private string Decrypt(string cipherText)

{

    string EncryptionKey = "MAKV2SPBNI99212";

    byte[] cipherBytes = Convert.FromBase64String(cipherText);

    using (Aes encryptor = Aes.Create())

    {

        Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });

        encryptor.Key = pdb.GetBytes(32);

        encryptor.IV = pdb.GetBytes(16);

        using (MemoryStream ms = new MemoryStream())

        {

            using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))

            {

                cs.Write(cipherBytes, 0, cipherBytes.Length);

                cs.Close();

            }

            cipherText = Encoding.Unicode.GetString(ms.ToArray());

        }

    }

    return cipherText;

}