des encryption example

Because of the illegal copying of computer software, communication leaks, data security is threatened, decryption and piracy problems increasingly serious, and even caused international disputes, so in information security technology, encryption technology occupies an irreplaceable position, so the information encryption technology and encryption means of researc

), $key); $tmp = '; for ($i =0; $i $MD 5= $str [$i]; $tmp. = $str [+ + $i] ^ $MD 5; } return $tmp; } Auxiliary functions: Copy Code code as follows: /* * Auxiliary function */ function Passport_key ($str, $encrypt _key) { $encrypt _key=md5 ($encrypt _key); $ctr = 0; $tmp = '; for ($i =0; $i $ctr = $ctr ==strlen ($encrypt _key) 0: $ctr; $tmp. = $str [$i] ^ $encrypt _key[$ctr + +]; } return $tmp; } Use the following

Public Properties Input string public string inputstring { Get{return inputstring;} Set{inputstring=value;} } Output string public string outstring { Get{return outstring;} Set{outstring=value;} } Input file path public string Inputfilepath { Get{return Inputfilepath;} Set{inputfilepath=value;} } Output file path public string Outfilepath { Get{return Outfilepath;} Set{outfilepath=value;} } Encryption key public string Encryptkey { Get{return Encrypt

Most of the time to the secret to be persistent encryption, at this time the encryption using MD5. When symmetric encryption is used, the Des method is used.1 Importjava.io.IOException;2 Importjava.security.MessageDigest;3 ImportJava.security.SecureRandom;4 5 ImportJavax.crypto.Cipher;6 ImportJavax.crypto.SecretKey;7 I

The example of this article describes the Java implementation des Encryption and decryption algorithm analysis. Share to everyone for your reference, specific as follows: Brief introduction: Data encryption Algorithm (encryption Algorithm,dea) is a symmetric

Supported DES encryption and iosjavades encryption for IOS and java Reprinted please indicate blog address: http://blog.csdn.net/mengxiangyue/article/details/40015727 Recently, we are considering data encryption requirements. So I simply read about Data Encryption. Of course

PHP implements DES encryption and decryption instance code, and phpdes encrypts and decrypts instances. PHP-implemented DES encryption and decryption instance code. phpdes encryption and decryption instance this article describes the PHP-implemented

Package COM. jadyer. util. codec; import Java. security. key; import Java. security. nosuchalgorithmexception; import javax. crypto. cipher; import javax. crypto. keygenerator; import javax. crypto. secretkey; import javax. crypto. secretkeyfactory; import javax. crypto. spec. deskeyspec; import Org. apache. commons. codec. binary. base64; /*** DES symmetric encryption algorithm * @ see ====================

Recently in the project, the issue of DES Encryption and decryption was encountered.Scene is the Android app side with Des encryption, PHP this side need to decrypt. No prior contact with Des this encryption and decryption algorit