What is AES Encryption and How Does it Work? | 合法醫療器材資訊網

The Advanced Encryption Standard (AES) is a symmetric block cipher[1] chosen by the U.S. government to protect classified information.

AES is implemented in software and hardware throughout the world to encrypt[2] sensitive data. It is essential for government computer security, cybersecurity and electronic data protection.

The National Institute of Standards and Technology (NIST[3]) started development of AES in 1997 when it announced the need for an alternative to the Data Encryption Standard (DES[4]), which was starting to become vulnerable to brute-force attacks[5].

NIST stated that the newer, advanced encryption algorithm[6] would be unclassified and must be "capable of protecting sensitive government information well into the [21st] century." It was intended to be easy to implement in hard...