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We propose a novel programmable weight phased array (PWPA) architecture and the corresponding transmission schemes for secure millimeter-wave communications. PWPA consists of a conventional phased-array architecture followed by a programable power amplifier used to adjust the weights of array element. We propose new solutions of inverted antenna subset transmission technique (IAST) and optimized weight antenna subset transmission technique (OWAST) based on PWPA. The proposed solutions use inverse phase signal to replace switching-off signal which can generate more artificial noise than conventional solutions on undesired direction. Theoretical and simulation results show that the proposed solutions provide better physical-layer security (PLS) performances compared current techniques.