cryptographic accelerator

This article describes how to implement the playfair and hill cryptographic algorithms in javascript. For more information, see the Introduction to information security at the end of the next period. The playfair and hill algorithms in classical cryptographic algorithms are interesting to implement in javascript. You can check Baidu and Code while learning about javascript. Playfair Playfair password (Engl

=source.getbytes (); /**Performing Cryptographic Operations*/ byte[] B1 =cipher.dofinal (b); Base64encoder Encoder=NewBase64encoder (); returnEncoder.encode (B1); } /*** Decryption Algorithm *@paramcryptograph Ciphertext *@return * @throwsException*/ Public StaticString Decrypt (String cryptograph)throwsException {Key privatekey; ObjectInputStream Ois=NULL; Try { /**to read a private key object in a file*/Ois=NewObjectInp

Using Cipher's core function, it encapsulates a cryptographic decryption tool class that can be used directly. You need to download Commons-codec-1.9.jar and import the project before you use it.The tool classes are as follows: Packagecom.pcict.util.test;Importorg.apache.commons.codec.binary.Base64;ImportJavax.crypto.*;ImportJavax.crypto.spec.DESedeKeySpec;ImportJava.nio.charset.Charset;Importjava.security.InvalidKeyException;ImportJava.security.Key;I

[Encrypted currency Security] How to securely store cryptographic currencies ?, Encrypted currency storage Password [Encrypted currency Security] How to securely store cryptographic currencies ?, It is very insecure to store encrypted currencies on trading websites. In July 0.5 billion, a Japanese cryptocurrency transaction platform named Coincheck was hacked and $30 million worth of cryptocurrency was sto

Today, a colleague reported a software error log record:This implementation is not part of the Windows platform FIPS-validated cryptographic algorithm. mscorlib, in System.Security.Cryptography.MD5CryptoServiceProvider. ctor ()A burst of crazy search in Baidu Bar to find a solution, verified that sure enough to solve the problem, record the paste address: http://tieba.baidu.com/p/4056696175 Win+r, enter regedit, hkey_local_machine\system\curre

In the development process of the website, we often need to encrypt some data (such as user password), this article mainly introduces several common cryptographic functions of PHP. MD5 Encryption: String MD5 (string $str [, bool $raw _output = false]) 1.MD5 () returns the hash value by default as a 32-character hexadecimal number, which accepts two parameters, the first is the string to encrypt, the second is a Boolean value of Raw_output, the defaul

=‘‘;for($i=0;$istrlen($txt);$i++){$md5=$txt[$i];$tmp.=$txt[++$i]^$md5;}return$tmp;}privatefunction__key($txt,$encrypt_key){$encrypt_key=md5($encrypt_key);$ctr=0;$tmp=‘‘;for($i=0;$istrlen($txt);$i++){$ctr=$ctr==strlen($encrypt_key)?0:$ctr;$tmp.=$txt[$i]^$encrypt_key[$ctr++];}return$tmp;}publicfunction__destruct(){$this ->crypt_key=null;}}?> We recommend that you save this type of file name: cls.sys_crypt.phpInstructions for how to use: 123456789 //使用前请先引入类文件，如：include‘cls

1 //MD5 the encryption of strings2-(void) Demo1 {3NSString *str =@" Love";4 5 //MD5 encryption of strings6str =str.md5string;7 8NSLog (@"str:%@", str);9 Ten //for a simpler password, you can find it through some websites, such as:http://www.cmd5.com One //artificially increase the difficulty of the password, you can add salt to the MD5 A //user password + Salt value MD5 operation -NSString *password =@"312816"; - //increase the salt value, and the longer (complex)

Cryptographic Code Writing004a1e6f push EAX004a1e70-Push EBX004A1E71 push ECX004a1e72-Push edx004A1E73-Push ESP004a1e74. Ebp004a1e75-i-push ESI004a1e76 Push EDI004a1e77 E8 00000000 Call server.004a1e7c004a1e7c 5D Pop Ebp004a1e7d 81ED 7c1e4a00 Sub ebp,server.004a1e7c004a1e83 BB 00104000 mov ebx,server.00401000004a1e88 03DD Add EBX,EBP004a1e8a B9 00010000 mov ecx,100004a1e8f 8033 98 xor byte ptr ds:[ebx],98004a1e92 Inc. ebx004a1e93 Dec ecx004a1e94 ^ F9

This is my PPT on cryptographic applications in network security. This paper systematically discusses the application of cryptography in network security, puts forward 15 types of actual network communication problems, and analyzes the systems and functions of symmetric and asymmetric passwords used in security and their common uses.Algorithm. It is of reference significance for the use of cryptography in network security applications to solve practic

encryption and decryption process description:Internet data transmission needs to be realized: confidentiality, data integrity, identity authentication and key exchange;For example: Alice transmits data to Bob;Data encryption Process:1,Alice generated the original data, using a one-way encryption algorithm to calculate the original data signature, to ensure data integrity;2, with their own private key to encrypt the original data signature and appended to the original data behind, to achieve id

A reversible cryptographic algorithm that can be shared between PHP and C #, In some projects require the generation of encryption in PHP, and then in ASP. NET to accept the password to decrypt, below and you share a PHP and ASP. C # can be shared reversible encryption algorithm, interested can refer to the reference. PHP Encryption algorithm: ASP. NET Program code: Using system;using system.collections.generic;using system.io;using system.linq;usin

Classic PHP Cryptographic decryption function authcode () fix code Authcode This function is used by many people, this function from the Discuz program, used to encrypt and decrypt the string, you can set the key (key) and expiration time, in many cases it is useful. The original function code may generate characters such as +,/, , resulting in the retrieval of value via URL being escaped, resulting in an inability to decrypt. A little modification o

PHP Base64_decode and Base64_encode encryption and decryption functions, the example of the Base64 encryption and decryption function of the specific use, has a certain practical value, the need for friends can refer to the nextThis paper describes the Base64_decode and Base64_encode cryptographic decryption functions in PHP.Share to everyone for your reference. The specific analysis is as follows: These two functions are used in PHP to encrypt the PH

MD5 Cryptographic Tool Classes PackageCom.tools;//encrypt the user.ImportJava.security.*; Public classmd5{ Public Final Staticstring Code (string s) {CharHexdigits[] = {' 0 ', ' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', ' 9 ', ' A ', ' B ', ' C ', ' d ', ' e ', ' F ' }; Try { byte[] strtemp =s.getbytes (); MessageDigest mdtemp= Messagedigest.getinstance ("MD5"); Mdtemp.update (strtemp); byte[] MD =mdtemp.digest (); in

Packagecom.microwisdom.utils;Importjava.security.NoSuchAlgorithmException;ImportJava.security.SecureRandom;ImportJava.util.logging.Level;ImportJava.util.logging.Logger;ImportJavax.crypto.Cipher;ImportJavax.crypto.KeyGenerator;ImportJavax.crypto.SecretKey;ImportJavax.crypto.spec.SecretKeySpec;Importorg.apache.commons.codec.binary.Base64;/** * @versionV1.0 * @desc AES Encryption Tool class*/ Public classAesutil {Private Static FinalString key_algorithm = "AES"; Private Static FinalString default_c

RSA Cryptographic decryption Error: Invalid length for Base-64 character arrayArticle 1.The program implements a function that serializes an object, passes it as a parameter to another page, and restores the object after it has been deserialized, but sometimes normal at run time, sometimes "invalid length of base-64 character array" error.Looking up data on the internet, it is said that when using the Convert.tobase64string () method to encode a strin

System.InvalidOperationException:This implementation is not part of the Windows Platform FIPS validated cryptographic ALG Orithms.This issue is caused by a system that has FIPS enabled, MD5 encryption in the. NET framework platform, and some other encryption methods that require FIPS validation, but FIPS does not support these methods, which raises the above exception.Workaround:Registry Hkey_local_machine\system\currentcontrolset\control\lsa\fipsalgo

MCrypt Simple IntroductionPHP programmers in writing code programs, in addition to ensure the high performance of the code, but also is very important, that is, the security of the program. In addition to the several encryption functions, PHP has a more full-featured PHP encryption extension Library MCrypt and Mhash.Among them, the MCrypt extension Library can achieve encryption and decryption function, that is, both plaintext can be encrypted or ciphertext can be restored.MCrypt is an important

Tags: des blog http io using ar strong SP divhttp://blog.csdn.net/xdweleven/article/details/38319351(1) des cryptographic functionsCreate or Replace functionEncrypt_des (P_text varchar2, P_key varchar2) return varchar2 isV_text varchar2 (4000);V_ENC varchar2 (4000);Raw_input RAW (128);Key_input RAW (128);Decrypted_raw Raw (2048);BeginV_text: = Rpad (P_text, (trunc (Length (p_text)/8) +1) *8, Chr (0));Raw_input: = Utl_raw. Cast_to_raw (V_text);Key_inpu