Introduction to the
AES Is an advanced data encryption standard that effectively defends against all known attacks on the DES algorithm. The default key length is 128 bits, and you can select 192 or 256 bits. This bit, by the way, refers to the bit.
Symmetric encryption algorithms include AES128, AES192, and AES256.
AES is block-based encryption, that is, one piece of data is processed at a time (16 bytes) and filled in when the data is not a multiple of 16 bytes. This is called a block cipher (as opposed to bit-based stream ciphers), where 16 bytes is the block length. AES has multiple modes such as ECB and CBC.
The advantages and disadvantages
advantages
- The key length of AES is larger than that of DES. It can be set to any multiple of 32 bits. The minimum value is 128 bits, and the maximum value is 256 bits
- AES has very low memory requirements and fast operation speed. Rijndael shows very good performance in software and hardware with and without feedback mode.
