AES-128 encryption, also known as Advanced Encryption Standard 128-bit, is a symmetric encryption algorithm widely recognised for its high level of security. It utilises a block cipher method, where data is divided into 128-bit blocks, each of which is then encrypted using a secret key that is 128 bits in length. The encryption process involves several rounds of transformation, including substitution, permutation, mixing and adding round keys. Each round enhances the security of the data, making it extremely difficult to decipher without the correct key. AES-128 encryption is highly robust and is adopted globally by organisations and governments to protect sensitive data. It is particularly favoured due to its balance of strong security and efficient performance.