With the development of symmetric cipher, the DES data Encryption Standard algorithm, because of its small key length (56 bits), has not adapted to the requirements of today's distributed open Network for data encryption security, so 1997 NIST
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
Yesterday wrote an asymmetric data encryption, today to write symmetric data encryption AES. Symmetric data encryption is the use of only one key for encryption and decryption, AES can use 128,192, and 256-bit keys.And then there's my tool
AES symmetric encryption and decryption code detailed introduction, for your reference, the specific content as follows
Package demo.security;
Import java.io.IOException;
Import java.io.UnsupportedEncodingException;
Import
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
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
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development of symmetric passwords, The des Data Encryption Standard algorithm has a small key length (56 bits) and is no longer applicable to the requirements of distributed open networks for data encryption security, therefore, in 1997,
AES encryption algorithm-algorithm principle
The AES algorithm is based on permutation and permutation operations. The arrangement is to reschedule the data, and the permutation is to replace one data unit with another. AES uses several different
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
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