Or my old point of view, we have to keep practicing to learn new things. So
I will not write some abstract concept, I intend to give some actual code later, hehe
In Microsoft's help, like to take it with examples called its new technology framework, I
It really does feel in real programming, and we often write our own based on these instance codes.
Practical application, so I also used the term framework.
:)
This example demonstrates how to use the
API interface calls, you need to encrypt the communication with Java, the communication process with DES encryption, Java Yonder des Key is a 64-bit string, and the previous C # des encryption is a key 8-bitThe key in the DESCryptoServiceProvider is 8 bits;The key in the Rij
Digital envelope encryption technology (algorithms combined with RSA and DES)
This algorithm combines the advantages of DES and RSA.
Principle:
!. The sender uses the des key to encrypt important data.
2. the sender uses the RSA public key to encrypt the des key.
3. Send mes
bits, each iteration performs the same operation, and the input per round depends on the output of the previous round. Take the first round as an example, describing the operation process for each round of iterations as follows:① the output m of the i-1 wheel as input to this wheel, and divides the input into two parts with equal left and right lengths, recorded as M=l R, and L and R are the left and right n bits of M respectively.The ② will swap the
parameters that need to be passed in the URL by the Get method
*/
function Args_encode ($data) {
if (Is_array ($data)) {
$string = Http_build_query ($data);
Return Base64_encode ($string);
} else {
return false;
}
}
/*** Get the parameters passed in the URL in the Get mode*/function Getargs () {$string = Base64_decode ($_get[' args ');Parse_str ($string, $g);return $g;}
http://www.bkjia.com/PHPjc/896780.html www.bkjia.com true http://www.bkjia.com/PHPjc/896780.html techarticle PHP
Recently made a mobile project, there are server and client types of projects, the client is to log on, the server will also return data, the server is developed in Java, the client to support multiple platforms (Android, iOS), while processing IOS data encryption encountered some problems. At first, the solution was DES encryption, the boss said
The DES algorithm has three entry parameters: Key, Data, Mode. Where key is 8 bytes A total of 64 bits, is the working key of the DES algorithm, the data is 8 bytes 64 bits, is to be encrypted or decrypted, the mode for DES works, there are two kinds: encryption or decryption.The D
The des (Data Encryption Standard) algorithm is a symmetric cipher system in the cryptographic system and has become the American Data Encryption Standard. It is a symmetric encryption algorithm developed by IBM in 1972.
There is not much to say about the theory. It is easy to get a headache. We only need to have two c
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 encryption algorithm, is: Extension=php_mcrypt.dll
Opening this extension in a configuration file is not yet av
In fact, with the previous article "the prelude to learning DES encryption algorithms" as the basis, it is easy to implement the DES algorithm.However, I found the source code from the Internet, written in Java, and written in C ++, but all the code seems to be the same. Why is it the same? At the beginning, I wrote a class and added all the methods to the class.
(passwd in VARCHAR2)RETURN VARCHAR2Isretval Varchar2 (32);BEGINretval: = Utl_raw.cast_to_raw (Dbms_obfuscation_toolkit. MD5 (input_string = passwd));RETURN retval;END;(4) Example of function use
DES encryption: Update tb_salarysign_staff S set s.staffpwd =encrypt_des (s.staffpwd, ' test#5124*!de ');
D
) 0x0000ffff;
keys[n++] = lefttemp ^ temp; keys[n++] = righttemp ^ (temp }
}//for each iterations
Return the keys we ' ve created
return keys;
}//end of Des_createkeys
TEST//////////////////////////////
function Stringtohex (s) {
var r = "0x";
var hexes = new Array ("0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "B", "C", "D", "E", "F");
for (var i=0 ireturn R;
}
function hextostring (h) {
var r = "";
For (Var i= (h.substr (0, 2) = = "0x")? 2:0 ireturn R;
}
var
Des. h file:
//////////////////////////////////////// //// // * Provided by Zhu Meng bin, national University of Technology Email: zmb.tsubasa@gmail.comThis product is free for use. */////////////////////////////////////// /// // # ifndef des_h # define des_h //! Enum bool {false, true };/*! If bool is not supported, use this or just replace with Char and use 1 for true, 0 for false; @ see Enum {encrypt, decrypt}; */Enum {encrypt, decrypt};/* @ brief
This article provides a detailed analysis of how to use DES for encryption and decryption in PHP. For more information, see
This article provides a detailed analysis of how to use DES for encryption and decryption in PHP. For more information, see
DES is a standard da
02
The encryption algorithm used in the project, because there is a lot of trouble in the middle of adapting to the Android version.MD5 algorithm and DES algorithm are common two kinds of encryption algorithms.MD5:MD5 is an irreversible encryption algorithm, according to my understanding, the so-called irreversible
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