Multimedia Security through LSB Matching

Steganography is the art of hidden communications, encoding/embedding hidden information in cover media in such a way so as not to provoke an eavesdropper's suspicion. In this paper, we propose an efficient image steganography technique which provides high embedding capacity as well as imperceptibility of stego image. Using fixed number (i.e. two) as the upper limit criteria for embedding, the target pixel, based on equality between pixel bits and secret data bits is selected for embedding. As an indicator to determine which pixel is used for embedding, least significant bit is reversed. The experimental results showed preserving stego image quality with ability of embedding high data capacity. Results showed that the proposed method gives better results than simple LSB and inverted LSB with higher PSNR and lower MSE.