About this question
Is it safe to use CBC mode for AES?
My research on this topic led to an article with the following lines in it -
AES encryption refers to the process of concealing electronic data using an approved 128-bit, 192-bit, or 256-bit symmetric encryption algorithm from the Advanced Encryption Standard (AES), also known as FIPS 197. The AES is a computer security standard for cryptographically securing electronic information, usually secret and top-secret government information. The standard is published and maintained by the National Institute for Standards and Technology (NIST).
The AES is one of many NIST-issued Federal Information Processing Standards (FIPS), which are approved by the U.S. Secretary of Commerce before publication to ensure their legal alignment with the Information Technology Management Reform Act of 1996 and the Computer Security Act of 1987. It is the only publicly available block cipher approved by the National Security Agency (NSA) for transmission and encryption of secret and top-secret information and intelligence.