des encryption example

PHP uses DES for encryption and decryption Des is a standard data encryption algorithm, the detailed introduction of this algorithm can refer to the wiki and Baidu Encyclopedia: Wiki Encyclopedia Baidu Encyclopedia PHP has an extension to support DES

Recently in preparation for the interview, found before the project used in the encryption technology are not clear, so summarize. The encryption technology used in the previous project is DES encryption, used to encrypt the fields that send the request, to ensure the security of the server data, and one is AES

. Decrypt_mode, key); Bytefina=cipher.dofinal (byted); } Catch(Exception e) {Throw NewRuntimeException ("Error Initializing Sqlmap class. Cause: "+e); } finally{cipher=NULL ; } returnBytefina; } /*** file files are encrypted and saved in the target file destfile * *@paramfile * Files to be encrypted, such as C:/test/srcfile.txt *@paramDestFile * file names such as c:/are stored after encryption Post-encrypted file. txt*/ Public

Security | encryption | data | Algorithm (Billion International-008) [Original] Use dotnet cryptography system to ensure data security ///////////////////////////////////////////////////////////// Author:stardicky// E-mail:stardicky@hotmail.com// qqnumber:9531511// Companyname:ezone International// class:hbs-0308// Title: Using dotnet cipher system to ensure data security// ///////////////////////////////////////////////////////////// Note: The

Supported DES encryption for IOS and java Recently, we are considering data encryption requirements. So I simply read about Data Encryption. Of course, it is not about the principle, but about how to implement it. Now we need to implement the cooperation between the mobile terminal and the backend (java) data

One, des encryption:First, the web search for a DES encryption algorithm tool class:Import java.security.*;Import javax.crypto.*;public class Deshelper {private static String Strdefaultkey = "national";Private Cipher encryptcipher = null;Private Cipher decryptcipher = null;/*** Convert a byte array to a string representing 16 binary values, such as: byte[]{8,18}

JAVA, PHP, C #, Object-c Universal des encryption and decryption JAVA, Android: Package Com.example.aric.test;import Javax.crypto.cipher;import Javax.crypto.secretkey;import Javax.crypto.secretkeyfactory;import Javax.crypto.spec.deskeyspec;import Javax.crypto.spec.IvParameterSpec; Import Android.util.base64;public class DES {public final static String des_ke

The Java Cryptography architecture is designed to follow two principles:1) The independence and reliability of the algorithm.2) Independence and interaction of the implementation.The independence of the algorithm is obtained by defining the password service class. Users only need to understand the concept of cryptographic algorithms without having to care about how to implement these concepts. The independence and interaction of the implementation is achieved through a cryptographic service prov

Symmetric encryption algorithm is an early application of encryption algorithm, the technology is mature. In the symmetric encryption algorithm, the sender of the data sends the plaintext (raw data) and the encryption key (Mi Yao) together with a special encryption algorithm

; Hexstring.append (plaintext); } returnhexstring.tostring ();}}. NET versionusingSystem;usingSystem.Data;usingSystem.Configuration;usingsystem.web;usingSystem.Web.Security;usingSystem.Web.UI;usingSystem.Web.UI.WebControls;usingSystem.Web.UI.WebControls.WebParts;usingSystem.Web.UI.HtmlControls;usingSystem.Data.SqlClient;usingSystem.Security.Cryptography;usingSystem.IO;usingSystem.Text; Public classtestdes{//Cookies Encryption Key Public Stat

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 2 Using System; 3 Using System. Collections. Generic; 4 Using System. text; 5 Using System. configuration; 6 Using System. IO; 7 Using System. Security; 8 Using System. Security. cryptography; 9 10 Namespace Spacename 11 { 12 Public Static Class Encryptionextensions 13 { 14 # Region

DES is a standard data encryption algorithm. For details about this algorithm, refer to Wikipedia and Baidu Encyclopedia: Wikipedia Baidu encyclopedia There is an extension in php that supports the DES encryption algorithm: extension = php_mcrypt.dll Opening the extension in the configuration file cannot be used in win

This article mainly introduces the implementation of the PHP DES Encryption and decryption package class, combined with a complete example of the PHP des Encryption and decryption package class definition and use skills, the need for friends can refer to the next In this pa

For project needs, write a class that generates an "Authorization Code" (The Authorization code mainly contains the expiration time used for the project), the generated authorization code will be written to a file that will automatically read the ciphertext in the file whenever the project runs, and then use a unique "key" to invoke a function to decrypt the ciphertext. read out the usage expiration time of the project. Before, I have to try to write the first, mainly base64+md5+ inverted string

The base and DES encryption methods used in peacetimeFor Des plus decryption, the key length is 8 bits, when the number of key bits entered is more than 8 bits automatic interception.BaotouCreate or Replace package Pkg_compare isfunction f_en_base64 (pi_str varchar2) return varchar2;function f_de_base64 (pi_str varchar2) return varchar2;Procedure P_decrypt_des(Pi

This article mainly introduces the DES encryption and decryption method implemented by PHP, and analyzes the related skills related to DES encryption and decryption implemented by PHP in the form of a complete example, if you need it, refer to the

This article mainly introduces the DES encryption and decryption method implemented by PHP, and analyzes the related skills related to DES encryption and decryption implemented by PHP in the form of a complete example, if you need it, refer to the

(byted);} catch (exception e) {Throw new runtimeexception ("error initializing sqlmap class. cause: "+ E);} finally {cipher = NULL;} return bytefina;} public static void main (string [] ARGs) throws exception {desutil des = new desutil ("123456"); // DES encrypted file // des. encryptfile ("G:/test.doc", "G:/encrypt test.doc"); //

This article mainly describes the compatibility of PHP and Java des Encryption and decryption code sharing, suitable for such as the Java language Server is written, the client is written in PHP, and need des encryption decryption situation, the need for friends can refer to the nextPhp　　JavaPackage com.test; Import i