在.NET中使用秘密加密/混淆字节数组的简单方法？

using System;
using System.IO;
using System.Security.Cryptography;

public class EncryptionHelper
{
    private static byte[] GenerateRandomKey()
    {
        using (var aes = Aes.Create())
        {
            aes.GenerateKey();
            return aes.Key;
        }
    }

    public static byte[] Encrypt(byte[] data, byte[] key)
    {
        using (var aes = Aes.Create())
        {
            aes.Key = key;
            aes.Mode = CipherMode.ECB; // 选择加密模式
            aes.Padding = PaddingMode.PKCS7; // 选择填充模式

            using (var encryptor = aes.CreateEncryptor())
            {
                return encryptor.TransformFinalBlock(data, 0, data.Length);
            }
        }
    }

    public static byte[] Decrypt(byte[] encryptedData, byte[] key)
    {
        using (var aes = Aes.Create())
        {
            aes.Key = key;
            aes.Mode = CipherMode.ECB; // 选择加密模式
            aes.Padding = PaddingMode.PKCS7; // 选择填充模式

            using (var decryptor = aes.CreateDecryptor())
            {
                return decryptor.TransformFinalBlock(encryptedData, 0, encryptedData.Length);
            }
        }
    }
}

public class Program
{
    public static void Main()
    {
        byte[] originalData = new byte[] { 1, 2, 3, 4, 5 };
        byte[] key = EncryptionHelper.GenerateRandomKey();

        byte[] encryptedData = EncryptionHelper.Encrypt(originalData, key);
        byte[] decryptedData = EncryptionHelper.Decrypt(encryptedData, key);

        Console.WriteLine("Original Data: " + BitConverter.ToString(originalData));
        Console.WriteLine("Encrypted Data: " + BitConverter.ToString(encryptedData));
        Console.WriteLine("Decrypted Data: " + BitConverter.ToString(decryptedData));
    }
}