AES/Rijndael Cryptography Simple Sample

AESCryptoSample.cs

using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;
					
public class Program
{
	public static void Main()
	{
		string key = "1234567812345678";
		
		string originalValue = "{\"keys\":{\"id-origin\":null,\"nome\":\"Maria da Silva\",\"data-nascimento\":\"19620506\",\"nome-mae\":null,\"genero\":\"F\",\"estado-civil\":null,\"nacionalidade\":null,\"end-logradouro\":null,\"end-cidade\":\"S\u00E3o Paulo\",\"end-estado\":\"SP\",\"end-pais\":\"Brasil\",\"fone-celular\":\"11988888888\",\"fone-fixo\":null,\"email\":\"mariadasilva@dataopera.com\",\"doc-cpf\":\"11111111111\",\"doc-rg\":\"222222222\",\"doc-cns\":\"1111111111111\",\"doc-passaporte\":null,\"contatos\":null},\"class\":\"dto-v1\",\"tokenTtl\":\"3600\",\"kind\":\"0\",\"origin\":\"DTO-CLINICWEB-DEV\"}";
		Console.WriteLine(" Original: " + originalValue);
		Console.WriteLine();
		
		string encriptedValue = Crypto.Encrypt(originalValue, key);
		Console.WriteLine("Encripted: " + encriptedValue);
		Console.WriteLine();
						
		string decryptedValue = Crypto.Decrypt(encriptedValue, key);
		Console.WriteLine("Decrypted: " + decryptedValue);
		
		Console.ReadLine();
	}
}

public static class  Crypto
{
	public static string Encrypt(string plainText, string key)
	{
		string cipherText;
		var rijndael = new RijndaelManaged()
		{
			Key = Encoding.UTF8.GetBytes(key),
			Mode = CipherMode.ECB,
			BlockSize = 128,
		};
		ICryptoTransform encryptor = rijndael.CreateEncryptor(rijndael.Key, rijndael.IV);

		using (var memoryStream = new MemoryStream())
		{
			using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
			{
				using (var streamWriter = new StreamWriter(cryptoStream))
				{
					streamWriter.Write(plainText);
					streamWriter.Flush();
				}
				cipherText = Convert.ToBase64String(memoryStream.ToArray());
				//cryptoStream.FlushFinalBlock();
			}
		}
		return cipherText;
	}

	public static string Decrypt(string cipherText, string key)
	{
		string plainText;
		byte[] cipherArray = Convert.FromBase64String(cipherText);
		var rijndael = new RijndaelManaged()
		{
			Key = Encoding.UTF8.GetBytes(key),
			Mode = CipherMode.ECB,
			BlockSize = 128
		};
		ICryptoTransform decryptor = rijndael.CreateDecryptor(rijndael.Key, rijndael.IV);

		using (var memoryStream = new MemoryStream(cipherArray))
		{
			using (var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
			{
				using (var streamReader = new StreamReader(cryptoStream))
				{
					plainText = streamReader.ReadToEnd();
				}
			}
		}
		return plainText;
	}
}