des encryption example

A reversible DES and TripleDES Encryption Class (original downmoon)Using System; Using System. Security; Using System. Security. Cryptography; Using System. IO; Using System. Text; Namespace EncryptDownmoon ...{ /** // /// Summary of EncryptSqlConn. /// Public class EncryptSqlConn ...{ Public EncryptSqlConn () ...{ If (mCSP = null) ...{ MCSP = SetEnc (); } } /** // /// Set the

Original address: http://blog.csdn.net/maxuyang1987/article/details/10226601 /*** DES encryption* @param plaindata* @param secretkey* @return* @throws Exception*/public static string encryption (String plaindata) throws exception{Cipher Cipher = null;try {cipher = Cipher.getinstance (des_algorithm);Cipher.init (Cipher.encrypt_mode, GenerateKey (KEY));catch (NoSu

Reference: http://www.cnblogs.com/lori/archive/2011/09/08/2170979.htmlThe problem is the URL encoding problem, if the URL is not encoded directly, then in the decoding, if the string exists "+" this special symbol, in the decoding will be replaced by "", at this time in the decryption will not be solved, resulting in the wrong result.I solve the method:First, the character first encryption , and then URL encoding , then does not appear the + number an

("DES"); Encryptcipher.init (Cipher.encrypt_mode, key); Decryptcipher= Cipher.getinstance ("DES"); Decryptcipher.init (Cipher.decrypt_mode, key); } Public byte[] Encrypt (byte[] arrb) throws Exception {returnencryptcipher.dofinal (ARRB); } Publicstring Encrypt (String str) throws Exception {returnBytearr2hexstr (Encrypt (Str.getbytes ())); } Public byte[] Decrypt (byte[] arrb) throws

PackageCom.cs99lzzs.shop.util;ImportJava.math.BigInteger;ImportJava.security.Key;Importjava.security.MessageDigest;Importjava.security.NoSuchAlgorithmException;ImportJava.security.spec.AlgorithmParameterSpec;ImportJavax.crypto.Cipher;Importjavax.crypto.SecretKeyFactory;ImportJavax.crypto.spec.DESKeySpec;ImportJavax.crypto.spec.IvParameterSpec;Importorg.apache.commons.lang.StringUtils;/*** Encryption Algorithm * *@version$Id: Descbcsecurity.java, v 0.1

/////////////////////////////////////////////////////////////Author:stardicky//e-mail: [email protected]//qqnumber:9531511//Companyname:ezone International//class:hbs-0308//Title: Using dotnet Password system to ensure data security///////////////////////////////////////////////////////////////Note: A des symmetric encryption algorithm using one of the dotnet cipher Systems ensures data security////////////

Although compared to the DES encryption class to write a des demo, but the heart of the doubts have not diminished, on the contrary, with continuous deepening, constantly aggravating. Originally thought spent 2 days to fix the demo, it has been understood a lot, but today at noon began pondering, and let me more distressed. There is some confusion about the pr

In recent time because the project needs, so has been committed to the network and information security, inevitably involved in information encryption and decryption, so these days have been hard to delve into cryptography. Cryptography is an ancient discipline, in the history of cryptography development, there have been a variety of encryption methods, and very early classical

Php code: Java code: Package com. test; import it. sauronsoftware. base64.Base64; import java. security. key; import java. security. secureRandom; import java. security. spec. algorithmParameterSpec; import javax. crypto. cipher; import javax. crypto. secretKeyFactory; import javax. crypto. spec. DESKeySpec; import javax. crypto. spec. ivParameterSpec; public class Main {public static final String ALGORITHM_DES = "DES/CBC/PKCS5Padding";/***

[] Decodedbytes =Bos.tobytearray (); Try{bos.close (); Bos=NULL; } Catch(IOException ex) {System.err.println ("Error while decoding BASE64:" +ex.tostring ()); } returndecodedbytes; } Private Static voidDecode (String s, OutputStream OS)throwsIOException {inti = 0; intLen =s.length (); while(true) { while(I ) I++; if(i = =len) Break; intTri = (decode (S.charat (i)) ) + (Decode (S.charat (i + 1)) ) + (Decode (S.charat (i + 2)) )

(). Decode (Data.getbytes ()); RT = new String (cipher,encoding);} catch (Exception e) {e.printstacktrace ();} return RT;} /** * Get password * @param secretkeystr * @param mode * @return */public static Cipher getdescipher (String secretkeystr,int mode {int remainder = Secretkeystr.length ()%8;if (remainder! = 0) {throw new RuntimeException ("secret key string must be a multiple of 8");} try {keygenerator keygen =keygenerator.getinstance ("AES"); Keygen.init (+, New SecureRandom (Secretkeystr

Public class encryptdesstring{// Default key vectorPrivate Static byte [] keys = {0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef }; /// /// DES encrypted string/// /// /// /// Public static string encryptdes (string encryptstring, string encryptkey){Try{Byte [] rgbkey = encoding. utf8.getbytes (encryptkey. substring (0, 8); // convert to byteByte [] rgbiv = keys;Byte [] inputbytearray = encoding. utf8.getbytes (encryptstring );Descryptoserviceprovider

/** * * DES for. NET version * @author Administrator * */class des_net{var $key; var $iv; Offset function des_net ($key, $iv =0) {//key length 8 for example: 1234ABCD $this->key = $key; if ($iv = = 0) {$this->iv = $key;//default to $key as IV} else {$this->iv = $iv;//mcrypt_c Reate_iv (Mcrypt_get_block_size (Mcrypt_des, MCRYPT_MODE_CBC), mcrypt_dev_random); }} function Encrypt ($STR) {//

Andriod's DES encryption 1 Main Code About the des package, you need to export the 64-bit package of Android. If you find com. sun..., a foundclass exception may occur. String key; Public DES (String key) { This. key = key; } Public String encrypt (String str ){ Byte [] enc = null; Try { Enc = desEncrypt (str, key )

Recently busy with Android and iOS projects, write the android des ECB mode encryption and decryption (related connection: http://blog.csdn.net/vipa1888/article/details/8086037), and return to the IOS above, because I recently started to study IOS this year, so many things on iOS don't understand. After half a year's research, I finally got it done with symmetric encryp