cryptography for kids

1th ChapterEncryption-DecryptionDecipherPlainText-redactionSecret keyCryptographic algorithmsSymmetric password-public key password (asymmetric password)One-way hash function-hash valueMessage Authentication CodeDigital signaturesPseudo-random

Understand and deploy symmetric encryption 1. Prepare the symmetric encryption software FatCryptoTool and office Password Recovery to crack the office Password. 2. symmetric encryption system: Dedicated encryption, fast and efficient. 3. Data

Implement encryption protection for office build applications Word: A. By default, word uses the rc4 encryption algorithm. B. Understand the risk of passwords. 1. Set the office password. 2. Crack the office password. Use Accent Office Password

Taking p=29 to find out all the solution points of elliptic curve y^2=x^3+4x+20Using the method of poor lifting to find the elliptic curveFirst step: List, find out the results of 0~28 (0Available programs to complete this step:The code is as

SSL/TLS is the most widely used password communication method in the world. It uses cryptographic techniques such as symmetric password, message authentication code, public key password, digital signature, pseudo-random number generator and so

Playfair. h # Ifndef playfair_h# Define playfair_h # Include # Include Using namespace STD; Class Playfair{PRIVATE:Char m_ch;Int m_position;String m_key;String m_letter;Void tolower (string & Str );Bool emptykey () const;Void keysameletter ();Void

1 MD5 = Md5.create (); 2 VaR = Md5.computehash (encoding. Unicode. getbytes ( " 123456 " )); 3 Stringbuilder sb =   New Stringbuilder (); 4 Foreach (VAR item In By) 5 { 6 SB. append (item.

1. Running result   CodeAs follows: View code 1 MD5 = Md5.create (); 2 Byte [] = Md5.computehash (encoding. Default. getbytes ( " 123456 " )); 3 Stringbuilder sb =   New Stringbuilder (); 4 Foreach

The result cannot exceed the Integer Range. I used the high precision and the second point passed in poj, but I failed to pass through the ultraviolet. Later, I saw a big bull using double directly on the Internet, which is really admirable. My code:

Http://acm.hust.edu.cn/vjudge/contest/view.action? Cid = 29592 # Problem/ // File name: bo_jwolf1.cpp // Author: bo_jwolf // created time:, Sunday, August 18, 2013 # include # include # include # include # include # include # include #

Diffusion and confusion are C. e. the two basic methods proposed by Shannon to design the password system are aimed at resisting the competitor's statistical analysis on the password system. in the design of the group password, the full use of

Ask K to make n times of K equal to P.Question: I am too lazy. However, you have to get familiar with high precision. If you have time, just make up the system. However, the valid range of types in C ++ must be noted as follows: Type               

Package mainimport ("crypto/AES" "FMT" "strings") func main () {// ------ AES encryption ------ // The key 16/24/32bytes corresponds AES-128/AES-192/AES-256.key: = [] Byte {1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6,

Off- topic: Personally think DES encryption and decryption is really a lengthy process, s box, p box and a variety of transformations to make people dazzling. A Feistel Password structureFirst of all, the reason for the Feistel cipher structure is

Use Apmserv 5.2.6 build PHP environment, through the apmser.5.2.6 management MySQL database, will automatically enter the phpMyAdmin login interface, the root account password default is empty, enter the phpMyAdmin prompts need to modify root

string Reverse Output As the name suggests = =| #!python3.3 def stringreverse (s): "" " @param s:string @return: Reversed string @example: Stringreverse (' abc ') output CBA "" "Return s[::-1] #start: end:step Caesar'

Example 1:the following Example uses AES function.Scripttype= "Text/javascript"src= "Http://cryptojs.altervista.org/api/functions_cryptography.js">Script>Scripttype= "Text/javascript">varCrypt= NewCrypt (); //Constructor/** *

[Article Title]: RSACrackMe512 analysis process and compilation of registration machine source code[Author]: coolstar14[Tools]: IDA, BigInterCalc, RDLP[Software name]: RSACrackMe512[Software size]: 40 KB[]: Http://bbs.pediy.com/attachment.php?

Encryption and decryption authentication 1. symmetric encryption single-key encryption: advantages: 1. faster than asymmetric key encryption 2. A large number of digits is hard to crack. Disadvantages: 1. A security mechanism is required to

Understand and deploy symmetric encryption 1. Prepare the symmetric encryption software FatCryptoTool and office Password Recovery to crack the office Password. 2. symmetric encryption system: dedicated encryption, fast and efficient. 3. Data