A unified approach to secure and robust hashing scheme for image and video authentication

The advancing world of communication is faced with challenging problems related to security and authenticity. In the context of multimedia communication, digital images and videos have been endangered with spatio-temporal manipulations. In this paper, a robust and secure hashing scheme based on DWT for the image and video authentication has been presented. For the image, the hashing scheme robustness allows the acceptable manipulations such as JPEG compression and low pass filtering and at the same time is sensitive enough to detect malicious manipulations. The adoption of DWT meets the requirement of robustness and fragility. Similarly for the video authentication, the scheme is divided into two parts: Data integrity and Source verification. Video authentication algorithm involves the DCT and special quantization scheme which makes the algorithm robust for different codec and sensitive to localize the tampered frame. Further the source verification is carried out by the use of MD5 and digital signature. Several experiments have been carried out and their results, presented in this paper, demonstrate the effectiveness of the algorithm.