ciphertext translator

Transferred from: http://www.smatrix.org/bbs/simple/index.php?t5662.html//////////////////////////////////////////////////////////////////////////////Directory1. PHP hash function and its application2. Symmetric cipher algorithm in PHP and its application3. PHP's public key cryptography algorithm and its application///////////////////////////////////////////////////////////////////////////////2 symmetric cipher algorithm in PHP and its applicationI've been trying to write the cryptography algori

database, in bytes one by one, no data loss occurs. For details, see section 2; Data loss occurs when data in the ciphertext table is exported and imported under different character sets. Description of ZHS160GBK and WE8ISO8859P1 character sets For the two character sets mentioned above, ZHS16GBK is the default database character set when Oracle is installed in Windows. WE8ISO8859P1 is the default database character set installed in Linux. Both cha

The encryption and decryption function in UCenterAPI, known as a classic in the php field, is also a major contribution of Kangsheng to php. it can generate dynamic ciphertext through a KEY, you can use this KEY to solve the problem. The encryption and decryption function in the UCenter API is called a classic in the php field and is also a major contribution made by Kangsheng for php. This function can generate dynamic

1. Summary of Character Set and Export Import Problems First, ensure that the Oracle database server is consistent with the client character set to ensure data encoding consistency. When the database server selects ZHS16GBK, when exporting and importing new data, the database server performs the ZHS16GBK encoding check on the imported binary database. When the data length is odd, if the last byte of the data is in decimal format: 129 to 254, this byte is lost. For details, see section 2. When WE

We know that HTTP requests are transmitted in plaintext, so-called plaintext refers to unencrypted information, which can be very dangerous if the HTTP request is intercepted by a hacker and contains sensitive data such as a bank card password. In order to solve this problem, Netscape company developed the HTTPS protocol, HTTPS can encrypt the transmission of data, that is, the transmission is ciphertext, even if the hacker in the transmission process

Symmetric encryption algorithm is an early application of encryption algorithm, the technology is mature. In the symmetric encryption algorithm, the sender of the data sends the plaintext (raw data) and the encryption key (Mi Yao) together with a special encryption algorithm, which makes it into a complex cipher cipher. After receiving the ciphertext, if you want to interpret the original text, it is necessary to decrypt the

, because 27 = 128:209 is small, but 28 = 256 is greater than 209.to encrypt the group (i) in clear-text mi from buffer m, use the public key (E,n) to get the value of M, ask it an E power, and then modulo n . This will result in a set of ciphertext CI. The modulo operation on n ensures that the CI will be aligned with the packet size of the plaintext . Thus, the plaintext groupings to be encrypted are:Ci = Mie mod nAs mentioned before, Euler's functi

DES algorithms generally have two key points, the first is the encryption mode, the second is the data complement, the main meaning of the encryption mode is that the encryption algorithm is encrypted by block, such as DES, is 64Bit a block of encryption, is to encrypt 8 bytes at a time, so each input eight bytes of clear text output eight bytes ciphertext , if it is 16 bytes, then divided into two blocks in order to encrypt, the problem appears here,

Original address: http://www.moye.me/2015/06/14/cryptography_rsa/IntroductionFor the addition and decryption, I have been in a knowledge of its reason why the state, the core part of the project does not rely on encryption and decryption algorithm, can reluctantly deal with the past, once the need for frequent applications such as AES/RSA algorithm, this state is quite a catch.It's time to get to know the principle, so I found this graphic cipher technique to make up your own lessons:In the book

Reprinted from: http://www.cnblogs.com/janken/archive/2012/04/05/2432930.html Recently made a mobile project, there is a server and client type of project, the client is to log in, the password to use DES encryption, the server is developed in Java, the client to support multi-platform (Android, iOS), while processing the IOS DES encryption encountered some problems , the original tune will not be the same as the android generated ciph