Privacy Protection Oriented Video Data Hiding Method

With the advent of the era of big data, enterprise big data, government big data, and network users big data have played great value in various industries. But at the same time, any behavior of people may be tracked and recorded. People's demand for privacy protection is also growing. In this paper, a HEVC reversible video data hiding algorithm combined with encryption technology is proposed for video big data to realize privacy protection. A monoalphabetic substitution cipher algorithm is used for encryption, then the encrypt data is embedded into the proposed multivariate array of the 4 x 4 luminance DST blocks to avert the distortion drift. With the inverse operation of multivariate array in decoder, the embedded video is perfectly reconstructed as the original encoded video. It is proved analytically and shown experimentally that the proposed algorithm can achieve high embedding capacity, security and low visual distortion. Performance comparisons with other existing schemes are provided to demonstrate the superiority of the proposed scheme.