Steganalysis of digital contents, based on the analysis of unique color triplets

The new steganalytic algorithm for detection of the presence of additional information that embeds into digital images and digital videos by LSB Matching method with a small hidden capacity (not more than 0.5 bpp) is presented. The proposed steganalytic algorithm analyses digital content in the spatial domain and is based on the accounting of sequential color triads in the matrix of unique colors of the digital content. Steganalytic algorithm has a high effectiveness of detecting the additional information embedded into one arbitrary color component of the container with a small hidden capacity