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This article will explain in detail what are the differences between aes and des in php. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

Differences: 1, DES will be divided into two plaintext for processing, while AES will process the whole block together to generate ciphertext; 2, AES much faster than DES, AES can encrypt large files in a few seconds; 3, DES round processing uses the function of expansion and replacement, while AES round processing uses the function of mixing columns and adding round keys.

This article operating environment: Windows10 system, PHP7.1 version, Dell G3 computer.

What are the differences between aes and des in php

The main difference between DES and AES is the encryption process. In DES, plaintext is divided into two halves before further processing; in AES, the whole block is not divided, but the whole block is processed together to generate ciphertext.

Relatively speaking, AES is much faster than DES, and compared to DES, AES can encrypt large files in seconds.

The shared key used in DES is considered less secure than AES because of its small bit size. DES is thought to be more vulnerable to violent attacks, and so far, AES has not encountered any serious attacks.

The implementation of the algorithm is evaluated on the basis of flexibility, and AES is more flexible than DES because it allows text of various lengths including 128,192,256 bits, while DES allows 64-bit fixed text to be encrypted.

The functions used in DES round processing are extension, replacement and replacement, XOR operations with turn keys, while the functions used in AES rounds are subbytes, shift rows, mixed columns, and add round keys.

AES is actually efficient in both hardware and software implementation, while DES is initially effective only in hardware.

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