加密&解密算法 [英] Encryption & Decryption algorithm

问题描述

我正在开发移动产品。我们正在使用xml文档中的数据。为了保证我们的数据安全，我们需要一个加密算法（但我们不希望他现有的算法导入）你能给我一些加密数据的步骤。（如果代码示例是最受欢迎的）。

Hi,
I am working on mobile product. We are using the data in xml document. In order to keep our data secure we need an encryption algorithm(but we don't want he existing algorithm to import)Can u give me some steps to encrypt the data.(if code example is most welcome).

推荐答案

http://www.java-tips.org/java-se-tips/javax.crypto/encryption-and-decryption-using-symmetric-2.html [ ^ ]







访问此链接。这将有助于你

http://www.java-tips.org/java-se-tips/javax.crypto/encryption-and-decryption-using-symmetric-2.html[^]



Visit this link. This will help you

参考：

使用高级加密STANDARD IN ANDROID [ ^ ]

Android中的安全AES加密和解密 [ ^ ]

加密/解密字符串 [ ^ ]

Refer:
USING THE ADVANCED ENCRYPTION STANDARD IN ANDROID[^]
Secure AES encryption and decryption in Android[^]
Encrypt/Decrypt Strings[^]

const string passphrase = "password";

public static string EncryptData(string Message)
    {
        byte[] Results;
        System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
        MD5CryptoServiceProvider HashProvider = new MD5CryptoServiceProvider();
        byte[] TDESKey = HashProvider.ComputeHash(UTF8.GetBytes(passphrase));
        TripleDESCryptoServiceProvider TDESAlgorithm = new TripleDESCryptoServiceProvider();
        TDESAlgorithm.Key = TDESKey;
        TDESAlgorithm.Mode = CipherMode.ECB;
        TDESAlgorithm.Padding = PaddingMode.PKCS7;
        byte[] DataToEncrypt = UTF8.GetBytes(Message);
        try
        {
            ICryptoTransform Encryptor = TDESAlgorithm.CreateEncryptor();
            Results = Encryptor.TransformFinalBlock(DataToEncrypt, 0, DataToEncrypt.Length);
        }
        finally
        {
            TDESAlgorithm.Clear();
            HashProvider.Clear();
        }
        return Convert.ToBase64String(Results);
    }

    public static string DecryptString(string Message)
    {
        byte[] Results;
        System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();
        MD5CryptoServiceProvider HashProvider = new MD5CryptoServiceProvider();
        byte[] TDESKey = HashProvider.ComputeHash(UTF8.GetBytes(passphrase));
        TripleDESCryptoServiceProvider TDESAlgorithm = new TripleDESCryptoServiceProvider();
        TDESAlgorithm.Key = TDESKey;
        TDESAlgorithm.Mode = CipherMode.ECB;
        TDESAlgorithm.Padding = PaddingMode.PKCS7;
        byte[] DataToDecrypt = Convert.FromBase64String(Message);
        try
        {
            ICryptoTransform Decryptor = TDESAlgorithm.CreateDecryptor();
            Results = Decryptor.TransformFinalBlock(DataToDecrypt, 0, DataToDecrypt.Length);
        }
        finally
        {
            TDESAlgorithm.Clear();
            HashProvider.Clear();
        }
        return UTF8.GetString(Results);
    }

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