Unity3D data encryption

Encryption mainly uses the AEC encryption method and the CBC encryption mode.AES (Advanced Encryption Standard) encryption is the next-generation encryption algorithm standard with high speed and high security level.In .NET, one implementation of the current AES standard is the Rijndael algorithm.

The code is as follows:

using System;using System.IO;using System.Security.Cryptography;using System.Text;public class EncryptTools{private static string AES_KEY = "abc123456789asfd"; // can be 16/24/32 bitprivate static string AES_IV = "gsf4jvkyhye57k8O";/// 
/// AES encryption (Advanced Encryption Standard, is the next generation encryption algorithm standard, fast speed, high security level, one implementation of the current AES standard is Rijndael algorithm)/// 
/// ciphertext to be encryptedpublic static string AESEncrypt(string EncryptString){return Encoding.UTF8.GetString(AESEncrypt(Encoding.UTF8.GetBytes(EncryptString)));}/// 
/// AES encryption (Advanced Encryption Standard, is the next generation encryption algorithm standard, fast speed, high security level, one implementation of the current AES standard is Rijndael algorithm)/// 
/// ciphertext to be encryptedpublic static byte[] AESEncrypt(byte[] contentBytes){if (contentBytes.Length == 0) { return contentBytes; }byte[] resultBytes;try{byte[] keyBytes = Encoding.UTF8.GetBytes(AES_KEY);byte[] iv = Encoding.UTF8.GetBytes(AES_IV);RijndaelManaged rm = new RijndaelManaged();rm.Key = keyBytes;rm.IV = iv;rm.Mode = CipherMode.CBC;rm.Padding = PaddingMode.PKCS7;ICryptoTransform ict = rm.CreateEncryptor();resultBytes = ict.TransformFinalBlock(contentBytes, 0, contentBytes.Length);}catch (IOException ex) { throw ex; }catch (CryptographicException ex) { throw ex; }catch (ArgumentException ex) { throw ex; }catch (Exception ex) { throw ex; }return resultBytes;}/// 
/// AES decryption (Advanced Encryption Standard, is the next-generation encryption algorithm standard, with high speed and high security level, one implementation of the current AES standard is Rijndael algorithm)/// 
/// ciphertext to be decryptedpublic static string AESDecrypt(string DecryptString){return Encoding.UTF8.GetString(AESDecrypt(Convert.FromBase64String(DecryptString)));}/// 
/// AES decryption (Advanced Encryption Standard, is the next-generation encryption algorithm standard, with high speed and high security level, one implementation of the current AES standard is Rijndael algorithm)/// 
/// ciphertext to be decryptedpublic static byte[] AESDecrypt(byte[] contentBytes){if (contentBytes.Length == 0) { return contentBytes; }byte[] resultBytes;try{byte[] keyBytes = Encoding.UTF8.GetBytes(AES_KEY);byte[] iv = Encoding.UTF8.GetBytes(AES_IV);RijndaelManaged rm = new RijndaelManaged();rm.Key = keyBytes;rm.IV = iv;rm.Mode = CipherMode.CBC;rm.Padding = PaddingMode.PKCS7;ICryptoTransform ict = rm.CreateDecryptor();resultBytes = ict.TransformFinalBlock(contentBytes, 0, contentBytes.Length);}catch (IOException ex) { throw ex; }catch (CryptographicException ex) { throw ex; }catch (ArgumentException ex) { throw ex; }catch (Exception ex) { throw ex; }return resultBytes;}}