security and encryption

Original: DES encryption and decryption matching C#des encryption decryption symmetric encryption in PHPThe online search for PHP des encryption and decryption exactly matches the previous c# string encryption decryption function can be used for C # and PHP communication to

Encrypted decryption function and DES encryption and decryption instance in PHP, Phpdes encryption and decryption instance In this paper, the application of cryptographic decryption function and DES encryption and decryption in PHP is described, and it is shared for everyone's reference. Specific as follows: Examples, examples of PHP

This article mainly introduces the base64 encryption, md5 encryption and sha1 encryption methods implemented by JS, and analyzes in detail various common JavaScript encryption methods and implementation techniques based on the example form, if you need it, refer to the example in this article to describe the base64

One, asymmetric encryptionAsymmetric encryption has a set of key pairs, one is public, anyone can obtain, called the public key;One is self-preservation and strictly confidential, called the private key.The rules are as follows:by someone A the public key encrypted message, only by the A the private key is decrypted;by A The private key encrypts the message, only by the A decryption of the public key. sender, the receiver holds the public key / privat

Client hash encryption (Javascript hash encryption, with source code), javascriptSummary It is hard to imagine the network environment in which users use the applications we developed. If the network environment in which users are located is not a trusted environment, the user's account security may be threatened, for example, when a user logs on, the account and

used for decryption, only the decryption holder. Even if the original text and ciphertext leak in a single encryption process, the cracker can not infer the private key in the case of knowing the original text, ciphertext and public key, which ensures the security of the data to a great extent.Here, we introduce a very representative asymmetric encryption algori

leak in a single encryption process, the cracker can not infer the private key in the case of knowing the original text, ciphertext and public key, which ensures the security of the data to a great extent.Here, we introduce a very representative asymmetric encryption algorithm, RSA encryption algorithm. RSA algorithm

, 192, 256 for the secret key (that is, the encryption key) is how many bits, such as using mcrypt_rijndael_128, then use this algorithm to encrypt the secret key length is 128bit, such as $key = ' fjjda09^$$#+*%$ Fada ', is 20 characters, that in the actual encryption only use the first 16 character encryption (16*8=128), less than 128bit PHP will use ' "". Some

algorithm PK process We all know that we can not compete with the wisdom of the global mathematicians. So it's not a good idea to design your own implementation algorithm. This also includes, in the implementation will not have a similar input super long string can overflow a class of bugs. Using symmetric algorithms alone After the standard hash security burst, and see someone called AES, in fact, this is not a good suggestion. AES These symmetri

algorithms that uses 3 64-bit keys to encrypt data three times. Data Encryption Standard (DES) is a long-standing encryption standard in the United States, which uses symmetric key cryptography. 3DES (i.e. Triple DES) is the DES encryption algorithm for the transition to AES (in 1999, NIST designated 3-des as the Transitional

Because of the illegal copying of computer software, communication leaks, data security is threatened, decryption and piracy problems increasingly serious, and even caused international disputes, so in information security technology, encryption technology occupies an irreplaceable position, so the information encryption