A Low-Cost Local Masking Radix-4 NTT Against Soft-Analytical Side-Channel Attacks. - Congwei Chen; Jinwei Pu; Jianxiong Zhang 003; Jiaying Liao; Ruidian Zhan; Fei Yu; Yun Chen 004; Shuting Cai (IEEE Trans. Very Large Scale Integr. Syst., 2026)