Google announced Adiantum, a new encryption method devised to protect Android devices without cryptographic acceleration. The new encryption form has been created for devices running Android 9 and higher that doesnt support AES CPU instructions. Google experts pointed out that Adiantums encryption/decryption processes on ARM Cortex-A7 processors are around five times faster compared to AES-256-XTS. The encryption process could represent the optimal solution for a wide range of devices running on Android OS that haven’t dedicated hardware for encryption, such as smartwatches and smart TVs.”]
Source: https://securityaffairs.co/wordpress/80914/mobile-2/android-adiantum-encryption.html