Adiantum

Adiantum uses a fast hash (NH + Poly1305) and a fast stream cipher (XChaCha12) to build a construction which encrypts an entire sector at a time. On an ARM Cortex-A7 processor, Adiantum decrypts 4096-byte messages at 10.6 cycles per byte, over five times faster than AES-256-XTS. It is a "super pseudorandom permutation" over the whole sector, which means that any change to the plaintext of the sector results in an unrecognizably different ciphertext sector and vice versa.