dlp encryption

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PHP uses OpenSSL for RSA Long Data Encryption (117) decryption (128) and DES encryption decryption

PHP uses OpenSSL for RSA encryption, if the plaintext to be encrypted is too long error, workaround: Encrypt the time 117 characters to encrypt once, and then all the cipher stitching into a cipher text, the decryption time needs 128 characters to decrypt, and then splicing into data.Encryption:/** * Encryption * @param $originalData * @return string|void * //*function Encrypt ($originalD

Implementation of PHP encryption algorithm reversible encryption algorithm and decryption sharing _php tutorial

The encryption algorithm is as follows: Copy CodeThe code is as follows: function Encrypt ($data, $key) { $key = MD5 ($key); $x = 0; $len = strlen ($data); $l = strlen ($key); for ($i = 0; $i { if ($x = = $l) { $x = 0; } $char. = $key {$x}; $x + +; } for ($i = 0; $i { $str. = Chr (Ord ($data {$i}) + (Ord ($char {$i}))% 256); } Return Base64_encode ($STR); } The decryption algorithm is as follows:Copy the Code code as follows:function Decrypt ($data

PHP Common hash encryption function, Phphash encryption _php Tutorial

PHP commonly used hash encryption function, Phphash encryption In this paper, we describe the commonly used hash encryption function in PHP. Share to everyone for your reference. The specific analysis is as follows: Copy the Code code as follows: $hash _list=hash_algos (); Returns the list of registered hash rules Print_r ($hash _list); Show results Create a fil

PHP string encryption and decryption function, php string encryption and decryption

PHP string encryption and decryption function, php string encryption and decryption /*************************************** * ***************************** Function Name: encrypt function: encryption and decryption string usage: encryption: encrypt ('str', 'E', 'nowamagic '); decryption: encrypt ('encrypted string ',

Tutorial on encryption folder and encryption folder

Tutorial on encryption folder and encryption folder Sometimes we want to keep a little bit of privacy in our computer, and we want to set a password for some files. We only need to enter a password for access, just like in our QQ space album, many of my friends like to set a password for their album and only tell them to visit. How can I set a password for folders on our computer? This article will share

PHP implementation of the QQ space G_TK encryption algorithm, G_TK encryption algorithm _php tutorial

PHP implementation of the QQ space G_TK encryption algorithm, G_TK encryption algorithm This paper introduces the implementation of PHP QQ space G_TK encryption algorithm. Share to everyone for your reference. Specific as follows: //G_TK calculates function getgtk ($skey) {$hash = 5381; for ($i =0; $i Hopefully this article will help you with your PHP p

PHP implementation of RSA encryption class instance, Phprsa encryption Instance _php tutorial

PHP implementation of RSA encryption class instance, PHPRSA encryption instance In this paper, we describe the RSA encryption class implemented by PHP. Share to everyone for your reference. The specific analysis is as follows: Signing, checking, asymmetric, and decrypting with OpenSSL is required to be used with the files of the certificates of the "." (Crt and

PHP implementation of cookie encryption method, Phpcookie encryption _php Tutorial

PHP implementation of cookie encryption method, Phpcookie encryption In this paper, we explain how PHP implements cookie encryption. Share to everyone for your reference. The implementation method is as follows: Copy CodeThe code is as follows: Class Cookie{/*** Decrypt a cookie that has already been encrypted** @param string $encryptedText* @return String*/priv

OC des encryption, so that with the Java cipher class with the Des/cbc/pkcs5padding method of encryption results same

Problem Description:Des encryption is used recently and is consistent with the results of Java's cipher class encryption. The cliper of Java has not been studied, but in work cipher generates a string based on the Des/cbc/pkcs5padding encryption method.In comparison, this string is formatted directly with the NSData generated by OC

Java Cryptographic algorithm sharing (RSA decryption, symmetric encryption, MD5 encryption) _java

(InvalidKeyException e) {throw new RuntimeException (e);catch (Illegalblocksizeexception e) {throw new RuntimeException (e);catch (Badpaddingexception e) {throw new RuntimeException (e);}}/*** Decryption of data by incoming RSA ciphertext and private key* * * * */public static string Rsadeencoding (String Sec,privatekey privkey) {try {Cipher CIP = cipher.getinstance ("RSA");Cip.init (CIP. Decrypt_mode, Privkey);byte[] by = Base64decoderstream.decode (Sec.getbytes ());Return a new String (cip.do

User Login module for necessary security handling (MD5 encryption, salt addition and transfer process encryption)

e10adc3949ba59abbe56e057f20f883e But this is still not safe, enter http://www.cmd5.com/encrypted ciphertext after decryption can get plaintext password For example, the database has more than one password clear text is 123456, the ciphertext generated by MD5 encryption is identical, so that others can be decrypted to obtain the same password In response to the above problems, we will add salt treatment. That is, at the time of user registra

How to implement RSA encryption and ASP. netrsa encryption in asp. Net

How to implement RSA encryption and ASP. netrsa encryption in asp. Net In our practical use, encryption is an important means to ensure data security. In the past, MD5 and SHA1 algorithms were used for data encryption when ASP was used. Although these two algorithms are fast and effective, they cannot be used to revers

Practical PHP shared with public key encryption class (different encryption results every time), php encrypted

Practical PHP shared with public key encryption class (different encryption results every time), php encrypted WEB interaction security has always been the primary solution for every major website. The PHP Encryption Class introduced in this article is very practical. It has a public key. This is the biggest highlight and cannot be decrypted without a public key,

Share an encryption algorithm and an encryption algorithm

Share an encryption algorithm and an encryption algorithm What is encryption? Can I eat it?We will share with you today that BASE64, MD5, and AES algorithms are implemented together. However, after encryption, the size will increase and he cannot eat them.I. Overview The encryption

PHP encryption and decryption functions and DES encryption and decryption instances

This article mainly introduces the encryption and decryption functions in PHP and DES encryption and decryption, and analyzes the principles and application methods of common PHP encryption and decryption algorithms encrypt and DES encryption and decryption in the form of examples, very practical and useful. This artic

Java encryption and decryption-DES symmetric encryption algorithm

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 ============================== ==================================

Discussion and summary on MD5 encryption of Android data encryption

Objective: Whether the password is stored in the project or whether the file is the same file, will use the MD5 algorithm, today to summarize the MD5 encryption algorithm. What is MD5 encryption? MD5 English full name "Message-digest algorithm 5", translated by "Message digest algorithm 5", from the MD2, MD3, MD4 evolved, is a one-way encryption

. NET encryption and decryption--symmetric encryption

One, the ideaSymmetric encryption contains a thing known as a key, before the message is sent using a key to encrypt the message, get ciphertext and send, the receiver receives the ciphertext, using the same key to decrypt, to obtain the original message.PS : The process of encrypting a message with a key, which is done by a cryptographic algorithm, is usually public. Two, the process of symmetric encryption1 , the sender and receiver hold the same ke

GUID and MD5 encryption, GUIDMD5 Encryption

GUID and MD5 encryption, GUIDMD5 Encryption GUID can generate an ID that is not easily repeated;MD5 encryption can protect your password. The encryption process is considered irreversible, and the MD5 code is stored in the server database. Even if the server is broken, the password cannot be stolen.The second program

Classic PHP encryption and decryption function Authcode () fixed version code, encryption and decryption authcode_PHP tutorial

The classic PHP encryption and decryption function Authcode () fixes the version code and encrypts and decrypts the authcode. The classic PHP encryption and decryption function Authcode () fixes the version code. encryption and decryption are used by many people. This function is used by the Discuz program to encrypt and decrypt strings, you can use the classic P

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