![]() ![]() Key Length: The number of rounds to be carried out depends on the length of the key being used to encrypt data.So it treats the 128-bit block size as 16 bytes during the encryption procedure. Byte Data: The AES encryption algorithm does operations on byte data instead of bit data.Key Expansion: It takes a single key up during the first stage, which is later expanded to multiple keys used in individual rounds.SP Network: It works on an SP network structure rather than a Feistel cipher structure, as seen in the case of the DES algorithm.In this tutorial, you will go through some of the standout features that AES offers as a globally standardized encryption algorithm. It consists of a series of linked operations, including replacing inputs with specific outputs (substitutions) and others involving bit shuffling (permutations). It is based on a substitution-permutation network, also known as an SP network. Once it encrypts these blocks, it joins them together to form the ciphertext. It converts these individual blocks using keys of 128, 192, and 256 bits. The AES Encryption algorithm (also known as the Rijndael algorithm) is a symmetric block cipher algorithm with a block/chunk size of 128 bits. What is the Advanced Encryption Standard? Thus, the Advanced Encryption Standard came into existence to overcome this drawback. They created the triple DES to fix this problem, but it never became mainstream because of its relatively slower pace. Going by today’s computational standards, breaking into the DES algorithm became easier and faster with every year, as seen in the image below.Ī more robust algorithm was the need of the hour, with longer key sizes and stronger ciphers to break into. ![]() ![]() ![]() When the Data Encryption Standard algorithm, also known as the DES algorithm, was formed and standardized, it made sense for that generation of computers. Why Was the AES Encryption Algorithm necessary? ![]()
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