A new concept is introduced to data hiding field. This concept, which is named as Forbidden Zone, corresponds to the region where it is forbidden to alter the host signal. A new data hiding method is devised depending on Forbidden Zone. The proposed method is formulated by using a single control parameter and quantizers. Using uniform source and uniform quantizers the proposed method is theoretically shown to be superior than QIM in 1D. The obtained theoretical result is also verified by experiments.