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Aegis128X4Mac
The Aegis128X4Mac message authentication function outputs 256 bit tags.
In addition to being extremely fast, its large state, non-linearity
and non-invertibility provides the following properties:
128 bit security, stronger than GHash/Polyval/Poly1305.
Recovering the secret key from the state would require ~2^128 attempts,
which is infeasible for any practical adversary.
It has a large security margin against internal collisions.