What is the detailed process of AES encryption?

Encryption is based on the mathematical encoding and decoding of information. There are two types of encryption, symmetric encryption and asymmetric encryption, symmetric encryption uses a common key for both parties, (of course, this key needs to be kept secret), here is asymmetric encryption, there are two keys in this encryption method, the key - one is a public key (as the name suggests, this is a key value that can be disclosed), and the other is a private key (external secret). When you send a message to us, the message is encrypted with a public key.

Once we receive your encrypted message, we use our private key to decipher the message password (information encrypted by our public key can only be decrypted by our private key, thus technically ensuring that only we can decipher the letter – because no one else has our private key). Use....

The AES encryption process involves 4 operations, which are:Byte substitutionRow shiftColumn confusionwithRound key plus

1.Byte substitution:The main function of byte substitution is to complete the mapping of one byte to another byte through the S-box.

2.Row shift: The function of row shift is to implement the displacement between bytes within a 4x4 matrix.

4.Round key addition: During the encryption process, the input of each round is XOR with the round key once (part of the current grouping and expansion keys is XOR by bit); Because the result of a binary number continuous XOR number is invariant, the key of the round can be restored by XECOR at the time of decryption.

5.Key Extension:Its complexity is an important part of ensuring the security of the algorithm.

When the packet length and key length are both 128 bits, the AES encryption algorithm is iterated for 10 rounds and requires 10 subkeys. The purpose of AES key extension is to extend the input 128-bit key into 11 128-bit sub-keys. AES's key expansion algorithm uses a word as a base unit (a word is 4 bytes), which happens to be a column of the key matrix.

Therefore, the 4-word (128-bit) key needs to be expanded into 11 sub-keys, for a total of 44 words.

The detailed process of the car foundation is shown in the following figure:

The AES encryption standard, also known as the Advanced Encryption Standard Rijndael Encryption Method, is a 21st-century encryption standard designed by the National Institute of Standards and Technology (NIST) to replace DES. The basic requirements of AES are that the symmetric block cryptography is adopted, the key length can be or 256 bits, the packet length is 128 bits, and the algorithm should be easy to implement on various hardware and software.

In 1998, NIST began the first round of analysis, testing and solicitation of AES, and a total of 15 candidate algorithms were generated.

In March 1999, the second round of AES2 analysis and testing was completed. On October 2, 2000, the United States** officially announced the selection of Rijndael, a cryptographic algorithm proposed by Belgian cryptographers Joan Daemen and Vincent Rijmen, as the encryption algorithm of AES.

AES encryption blocks and key lengths can be 128B, 192B, or 256B. AES encryption has a lot of rounds of repetition and transformation.

Why is it encrypted many times in AES Hello dear, WIFI's Gakai Town grip encryption method ASE is an advanced encryption standard. WPA-PSK WPA2-PSK is the type of encryption we often set up now, this type of encryption has high security performance, and the setup is quite simple, but it should be noted that it has AES and TKIP encryption algorithms. tkip：

Temporal Key Integrity Protocol, which is an old encryption standard. AES: Advanced Encryption Standard, which is more secure than TKIP and is recommended.

The use of AES encryption algorithm is not only more secure, but also faster than TKIP in wireless network transmission rate due to the latest technology. Hope it helps. If my answer is helpful to you, please also give a thumbs up (comment in the lower left corner), look forward to your like, your efforts are very important to me, and your support is also the driving force for my progress.

Finally, I wish you good health and a happy mood!

1. Meaning of AES: AES technology is a symmetric block encryption technology, which uses 128-bit block encryption data to provide higher encryption strength than the RC4 algorithm of WEP TKIPS. AES's cipher and decipher tables are separate, and sub-key encryption is supported, which is superior to the previous practice of decrypting with a special key.

2. AES is an iterative, symmetric key block cipher that can use 12192 and 256-bit keys, and encrypt and decrypt data with 128-bit (16-byte) packets.

3. AES algorithm, known as AdvancedEncryptionStandard, is a substitute for DES algorithm and one of the most popular symmetric encryption algorithms today. To learn AES algorithms, you first need to figure out three basic concepts: key, padding, and pattern.

The key is the basis for the AES algorithm to achieve encryption and decryption.

4. AES encryption algorithm is an advanced encryption standard in cryptography, the encryption algorithm adopts symmetric block cryptography, the minimum support of the key length is 1219256, the group length is 128 bits, and the algorithm should be easy to implement in various hardware and software.

5. AES belongs to the symmetric encryption algorithm, so the biggest feature of the algorithm is that the encryption key and the decryption key are the same. In addition, AES operations are relatively simple and are widely used in data stream encryption.

6. AES: Advanced Encryption Standard (English: AdvancedEncryptionStandard, abbreviation:

AES), also known as Rijndael cryptography in cryptography, is a block encryption standard adopted by the United States Federal **. This standard is used to replace the original DES, which has been analyzed by many parties and is widely used around the world.