S. Matsufuji et K. Imamura, A spread-spectrum communication system protecting information data from interception, IEEE INFO T, 46(4), 2000, pp. 1691-1695
This correspondence tries to construct a direct-sequence spread-spectrum mu
ltiple-access communication system, so that the difficulty of wiretapping f
rom insiders' and outsiders' attacks increases and the worst case error pro
bability decreases, as much as possible. Bent sequences with optimal period
ic correlation properties are assigned to users, as spreading sequences cor
responding to secret keys.