ABSTRACT
This chapter details audio watermarking, audio secret sharing and audio-based steganography approaches. It explains video watermarking, video secret sharing and video-based steganography approaches. The chapter presents a few other advanced research areas related to multimedia security. Image-based security techniques can be used to protect other multimedia objects like audio and video. An image is a two-dimensional matrix whereas audio or speech is a one-dimensional vector. Fragile watermark bits are generated using any self-embedding approach applied on bits of audio samples and embedded into the least significant bits (LSBs) of the samples. Shamir's basis matrix can be applied on the binary stream of speech for developing a basic audio secret sharing approach. Image-based security techniques are applied on each frame of video and finally all frames are combined together in order to achieve video steganography/watermarking/secret sharing. Randomly selection of frames in video for watermark or secret message embedding can enhance the security.
