A regular rule for constructing infinite families of orthogonal Walsh W(n) and orthogonal C(n)systems is suggested, which possesses the property of two-loop cyclic shift and is based on complete classes of perfect binary arrays (PBA) H(N), where N = 2k and N = 3 × 2k is PBA order, n = N2 is orthogonal systems order, and k is an arbitrary integer. Methods that increase information security by integrating multiplexing, ciphering and channel encoding operation are developed on the basis of families of C(n)orthogonal systems, which also allow solving system tradeoffs in CDMA technologies.