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The '''Advanced Encryption Standard (AES)''' is a widely used symmetric-key encryption algorithm that provides a high level of security for data transmission and storage. It was developed by the National Institute of Standards and Technology (NIST) in response to the need for a more secure encryption algorithm to replace the aging Data Encryption Standard (DES).

AES uses a block cipher to encrypt and decrypt data in fixed-size blocks of 128 bits. It supports three different key lengths: 128-bit, 192-bit, and 256-bit. The key length determines the strength of the encryption, with longer keys providing greater security.

AES operates using a series of substitution and permutation operations on the input data and the encryption key. These operations are repeated for multiple rounds, with the number of rounds depending on the key length. The resulting output is an encrypted version of the input data that is difficult to decrypt without the correct encryption key.

One of the key benefits of AES is its high level of security. The algorithm has been extensively studied and tested by security experts and is widely regarded as one of the most secure encryption algorithms currently available. It is also highly efficient, with relatively low computational overhead, making it well-suited for a wide range of applications.

AES is used in a variety of applications, including securing online transactions, protecting sensitive data stored on computers and mobile devices, and securing communication channels between devices. It is also used by governments and military organizations to protect classified information.

In conclusion, the Advanced Encryption Standard (AES) is a widely used symmetric-key encryption algorithm that provides a high level of security for data transmission and storage. It is highly efficient and has been extensively tested, and is widely regarded as one of the most secure encryption algorithms currently available. AES is used in a variety of applications, including securing online transactions, protecting sensitive data, and securing communication channels between devices.



== See Also ==
*[[Data Security]]
*[[Information Security]]