New bit parallel multiplier with low space complexity for all irreducible trinomials over GF(2 ⁿ)

Koç and Sunar proposed an architecture of the Mastrovito multiplier for the irreducible trinomial f(x)=x ⁿ+x ^k+1 , where k ≠ n/2 to reduce the time complexity. Also, many multipliers based on the Karatsuba-Ofman algorithm (KOA) was proposed that sacrificed time efficiency for low space complexity. In this paper, a new multiplication formula which is a variant of KOA presented. We also provide a straightforward architecture of a non-pipelined bit-parallel multiplier using the new formula. The proposed multiplier has lower space complexity than and comparable time complexity to previous Mastrovito multipliers' for all irreducible trinomials.