Hardware Optimizations and Analysis for the WG-16 Cipher with Tower Field Arithmetic.

This paper explores tower field constructions and hardware optimizations for the WG-16 stream cipher. The constructions ${\mathbb {F}}_{(((2^2)^2)^2)^2}$ and ${\mathbb {F}}_{(2^{4})^4}$ were chosen because their small subfields enable high speed arithmetic implementations and their regularity provides flexibility in pipeline granularity. A design methodology is presented where the tower field c...