A Highly Secure Method to Hide DCI in SPWS

A simple and efficient method of digital color image steganography will be introduced, the method will replace the popular color image used as a covering method in most recently existing method by a simple saw tooth periodic wave signal, this signal can be easily generated, and the size in samples of this signal can be easily controlled by the selected values of the generation time and the sampling frequency. The covering SPWS samples will be presented using 64_bits binary presentation, while the unsigned decimal values of the secret image to be hidden will be presented using 8_bits binary presentation. Changing the 32 LSBs of the covering samples will not much affect the sample value, so each sample will be used to hold 4 bytes from the secret image, thus the capacity hiding will increased and it will equal the size of SPWS in samples multiplied by 4. The proposed method will use a batch operation to replace-extract the 32 LSBs of the covering samples using only one operation based on the reshaping process of the binary matrices. The proposed method will be tested using various images, the obtained results will be used to prove the enhancements provided by the proposed method in the quality and speed of image steganography.