Adiantum—Google presents full-disk encryption scheme for low-end hardware:

https://security.googleblog.com/2019/02/introducing-adiantum-encryption-for.html

– normally, Android uses AES-128-CBC-ESSIV for full-disk encryption and AES-256-XTS for file-based encryption
– Adiantum uses ChaCha (12 rounds) as well as Poly1305 and NH
– Adiantum can be enabled for devices with AES performance <= 50 MiB/sec, faster devices continue to use AES

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