Efficient Fixed-Point Implementation of Mitaka

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The Mitaka signature scheme is a variant of Falcon (FN-DSA). It has a considerably simpler signing procedure that can be parallelized while retaining Falcon's efficiency advantage. Mitaka offers two different signing approaches: a default one relying on floating-point arithmetic and an alternative, called MitakaZ, avoiding floating-point arithmetic at the cost of more Gaussian samples. Despite its better portability, MitakaZ has not previously been implemented in practice. This work presents