What is the block size used by AES encryption?

AES (Advanced Encryption Standard) encryption utilizes a block size of 128 bits. This means that AES processes data in fixed-size blocks of 128 bits at a time. The choice of 128 bits as the block size supports strong security and performance, making AES both efficient and secure for a variety of applications. In contrast, the other options—64 bits, 256 bits, and 512 bits—do not accurately reflect the standard defined by AES. While AES supports key sizes of 128, 192, and 256 bits, the defining feature of its encryption process is the 128-bit block size. This uniformity in block size is key to its widespread adoption and trustworthiness in securing sensitive data.