Шифрование произвольных данных

using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;
namespace RSDN
{
   public class Crypt
   {
      public static byte[] Encrypt(byte[] data,string password)
      {
         SymmetricAlgorithm sa = Rijndael.Create();
         ICryptoTransform ct = sa.CreateEncryptor((new PasswordDeriveBytes(password,null)).GetBytes(16),new byte[16]);
         MemoryStream ms = new MemoryStream();
         CryptoStream cs = new CryptoStream(ms,ct,CryptoStreamMode.Write);
         cs.Write(data,0,data.Length);
         cs.FlushFinalBlock();
         return ms.ToArray();
      }

      public static string Encrypt(string data,string password)
      { 
         return Convert.ToBase64String(Encrypt(Encoding.UTF8.GetBytes(data),password));
      }

      static public byte[] Decrypt(byte[] data,string password)
      {
         BinaryReader br = new BinaryReader(InternalDecrypt(data,password));
         return br.ReadBytes((int)br.BaseStream.Length);
      }
      
      static public string Decrypt(string data,string password)
      {
         CryptoStream cs = InternalDecrypt(Convert.FromBase64String(data),password);
         StreamReader sr = new StreamReader(cs);
         return sr.ReadToEnd();
      }
     
      static CryptoStream InternalDecrypt(byte[] data,string password)
      {
         SymmetricAlgorithm sa = Rijndael.Create();
         ICryptoTransform ct = sa.CreateDecryptor((new PasswordDeriveBytes(password,null)).GetBytes(16),new byte[16]);
         MemoryStream ms = new MemoryStream(data);
         return new CryptoStream(ms,ct,CryptoStreamMode.Read);
      }
   }
}