The Internet reported that the National Institute of Standards and Technology (NIST) recently proposed to uniformly expand the block and key lengths of the Advanced Encryption Standard (AES) to 256 bits to meet the encryption needs of big data processing and quantum computing threats. Current AES uses 128-bit blocks and supports 128, 192, and 256-bit key lengths. NIST said that increasing the length of blocks and keys will help improve the ability to combat quantum computing and ensure the security of cryptographic systems. At the same time, other quantum security solutions are being tested, including post-quantum cryptography experiments completed by the Singapore Monetary Authority and the Bank of France. Although the quantum computing threat is decades away, experts are calling for encryption systems to be prepared.