asp.net数据库加密

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

public class AesEncryption
{
    private static readonly byte[] Key = new byte[32]; // 256-bit key
    private static readonly byte[] IV = new byte[16]; // 128-bit IV

    static AesEncryption()
    {
        // Initialize key and IV with secure random values
        using (RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider())
        {
            rng.GetBytes(Key);
            rng.GetBytes(IV);
        }
    }

    public static string Encrypt(string plainText)
    {
        using (Aes aes = Aes.Create())
        {
            aes.Key = Key;
            aes.IV = IV;

            using (MemoryStream ms = new MemoryStream())
            {
                using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
                {
                    using (StreamWriter sw = new StreamWriter(cs))
                    {
                        sw.Write(plainText);
                    }
                }
                return Convert.ToBase64String(ms.ToArray());
            }
        }
    }

    public static string Decrypt(string cipherText)
    {
        using (Aes aes = Aes.Create())
        {
            aes.Key = Key;
            aes.IV = IV;

            using (MemoryStream ms = new MemoryStream(Convert.FromBase64String(cipherText)))
            {
                using (CryptoStream cs = new CryptoStream(ms, aes.CreateDecryptor(), CryptoStreamMode.Read))
                {
                    using (StreamReader sr = new StreamReader(cs))
                    {
                        return sr.ReadToEnd();
                    }
                }
            }
        }
    }
}