cryptography for kids

       Domestic mobile App Store, more forums, there are quite a lot of stores, forums only need to submit, fill in the information and description after a little can be completed upload, there is no audit, so loose mechanism, just to the hacker

December 03, 2010 author the5fire After nearly two weeks of intense and intense cryptographic learning, it is finally time to come to an end. Since it is a paragraph, there will be a paragraph, so it is necessary. The title of this paper is "three

Word-changer passwordExample:Encrypt the following string:HELLOWORLDTransformation rules such asGet ciphertext: GswwmzmuweMulti-table override passwordExample:Encrypt the following string:HELLOWORLDTransform Rule (key): n = 5 The first

First look: Change the transparency of one image to 50%. After overlapping the two images: Source: http://leemon.com/crypto/VisualCrypto.html   You can check it out first. The author means that Party A and Party B need to transmit the

generating public and private keys using the OpenSSL command Generate private Key # OpenSSL genrsa-out Rsa_private_key.pem 1024//generate public Key # OpenSSL rsa-in rsa_private_key.pem-pubout-out rsa_public_ Key.pem Here is the sample code: ';/

Reprinted please indicate the source: Thank you http://user.qzone.qq.com/289065406/blog/1299228474   Tip: General idea: Binary + High PrecisionAlgorithm   However, there is a more clever way to deal with this question: First, make it

Symmetric encryption is the oldest and most classical encryption standard in the field of computer encryption. Although symmetric encryption is considered no longer a secure encryption method, until now, we have seen no sign of its being eliminated.

aes-ni Instruction Set Aes-ni is an extension of the x86 instruction set architecture for Intel and AMD microprocessors, presented by Intel in March 2008. [1] The purpose of the instruction set is to improve the speed with which applications use

Steps:Randomly select two large prime numbers p and q,p not equal to Q, calculate N=PQ.According to Euler function, r= (p-1) (q-1) is obtained.Select an integer w that is less than R and Coprime, and obtain a modulo inverse of w about modulo R,

RSA algorithm is a public key encryption algorithm, RSA algorithm compared to other algorithms are very clear, but the difficulty is very difficult to crack. The RSA algorithm is based on a very simple theory of numbers fact: it is easy to multiply

Introduced: First enter n, then enter n * n matrix, and finally output the value of the matrix. #include using namespace std; float result; int a[1010][1010]; float aa[1010][1010]; int n; void Swap (float *a, float *b) {for (int i = 1; I

PFS (password System) Full name: Perfect forward secrecy. For a cryptographic system, if a key is stolen, only the data encrypted by the key is stolen. Some cryptographic systems have keys that are exported from a first key, so if a key is stolen,

A lot of hackers are getting started with breaking passwords! But the decryption password became an important compulsory course, today I want to talk about is not how to crack the password, but a psychological article about the password! If some of

Enter plaintext, replace it with password 3421567, and perform a multiple-step substitution after implementation Using System.Collections.Generic; Using System.Text; Namespace Zhihuan {class Program {static void Main (string[] args) {Cha

This test instructions is simple: for example k^n = p; Given you n and p to ask for K. Idea: The pit of this problem in P is 10^101 greater than int's representation range, but the output is an int, so in order to avoid the accuracy of a double his

Applied cryptography. By Bruce Schneier Programming on purpose, vols. I and II. By P. J. plauger Writing solid code. By Steve Maguire 1995 Essential client/server maintenance Val guide. By Robert Orfali, Dan harkey, Jeri Edwards Debugging the development process. By Steve Maguire Design patterns by Erich Gamma, Richard Helm, Ralph Johnson, John vlissides The design and evolution of c ++. By Bjarne stroustrup 1996

syntactic grouping, and commas for syntactic separation.) Rather, you are need to tell Perl explicitly so you want to pretend that a-list is a scalar. It turns out this square brackets are powerful enough to do:$wife {"Jacob"} = ["Leah", "Rachel", "Bilhah", "Zilpah"]; # OKThat is statement creates an unnamed array and puts a reference to it into the hash element $wife {"Jacob"}. Suppose we wanted to list not only Jacob's wives but all the sons of each of his wives. In this case we are want to t

Password (cryptography) is a kind of information processing system, which involves many aspects such as confidentiality , integrality , authentication and non-repudiation . The History of cryptography development Since the human society has the war, has the confidential communication, needs the information processing system. Before 1949, the research and application of