Criptografia

using System;
using System.Security.Cryptography;
using System.Text;

namespace AspNetGeeks
{
    public class Cryptography
    {
        private static readonly byte[] _salt = Encoding.UTF8.GetBytes("ASPNETGEEKS@2019");

        public static string Encrypt(string data, byte[] salt = null)
        {
            var saltHash = salt ?? _salt;

            using (var hashProvider = new MD5CryptoServiceProvider())
            {
                var tripleDESCryptoServiceProvider = new TripleDESCryptoServiceProvider
                {
                    Mode = CipherMode.ECB,
                    Key = hashProvider.ComputeHash(saltHash),
                    Padding = PaddingMode.PKCS7
                };

                var crypt = tripleDESCryptoServiceProvider;

                using (var transforme = crypt.CreateEncryptor())
                {
                    var dados = Encoding.UTF8.GetBytes(data);
                    return Convert.ToBase64String(transforme.TransformFinalBlock(dados, 0, dados.Length));
                }
            }
        }

        public static string Decrypt(string data, byte[] salt = null)
        {
            var saltHash = salt ?? _salt;

            using (var hashProvider = new MD5CryptoServiceProvider())
            {
                var tripleDESCryptoServiceProvider = new TripleDESCryptoServiceProvider
                {
                    Mode = CipherMode.ECB,
                    Key = hashProvider.ComputeHash(saltHash),
                    Padding = PaddingMode.PKCS7
                };
                var descriptografar = tripleDESCryptoServiceProvider;

                using (var transforme = descriptografar.CreateDecryptor())
                {
                    var dados = Convert.FromBase64String(data.Replace(" ", "+"));
                    return Encoding
                        .UTF8
                        .GetString(transforme.TransformFinalBlock(dados, 0, dados.Length));
                }
            }
        }
    }
}