The paper studies the increasing practical need for simultaneous wireless power and information transfer within a secrecy channel framework. The primary objective is to maximize the secrecy rate while guaranteeing the transmit power and the energy harvested by individual receiver. Given the inherently nonconvex nature of these optimization problems, the research introduces an effective solution utilizing DC programming along with the DC Algorithm approach, a contemporary methodology for tackling nonconvex issues. The problem’s unique structure is exploited by applying semidefinite relaxation and the S-procedure, enabling the transformation into general DC programs. An efficient algorithm, based on general DC approach, is then proposed to due with the reformulated problem. The proposed methodology’s effectiveness is validated through numerical simulations.