First, the basic concept of AES algorithm
AES is the abbreviation of Advanced Encryption Standard (Advanced encryption Standard), AES has the following three characteristics.
1 AES is symmetric encryption algorithm
The concept of symmetric
AES encryption is a very advanced encryption. many people say it is very difficult to crack AES encryption. the following section describes an example of how to use the AES encryption algorithm to encrypt data. when studying Discuz, we found that
With the development of symmetric passwords, The des Data Encryption Standard algorithm has a small key length (56 bits) and is no longer applicable to the requirements of distributed open networks for data encryption security, therefore, in 1997,
Advanced Encryption Standard (English: Advanced encryption Standard, abbreviation: AES), also known as the Rijndael encryption method in cryptography, is a block encryption standard used by the U.S. federal government. This standard, which replaces
support for AES in JCE, supported modes and fill modesAES in JCE supports v mode: CBC,CFB,ECB,OFB,PCBC; supports three kinds of padding: nopadding,pkcs5padding,iso10126padding. Ssl3padding is not supported. The "NONE" mode is not supported. where
Objective:
In addition to landing in the project, payment and other interfaces using RSA asymmetric encryption, outside the use of AES symmetric encryption, today we come to understand the AES encryption.
Several other encryption methods:RSA
Example of AES encryption and decryption in php. AesDemo. php: for example, copy the code as follows :? Phprequire_once (. AES. php); $ aesnewAES (true); store the encrypted string in hexadecimal format. aesDemo. php:
Example,
The code is as
Advanced Encryption Standard (English: Advanced encryption Standard, abbreviation: AES), also known as the Rijndael encryption method in cryptography, is a block encryption standard used by the U.S. federal government. This standard, which replaces
aesdemo.php:
Example
Copy the Code code as follows:
Require_once ('./aes.php ');$aes = new Aes ();$aes = new Aes (TRUE);//Store the encrypted string as hexadecimal$aes = new Aes (true,true);//With debug information and encrypted string stored in
Put the code first. There are two files: AES. php (aes algorithm file) and aesDemo. php (application instance file) aesDemo. php:
Example,
The Code is as follows:
Require_once ('./AES. php ');// $ Aes = new AES ();$ Aes = new AES (true); //
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