The paper focuses on the comparison of video steganography methods for the purpose of digital watermarking in the context of copyright protection. Four embedding methods that use Discrete Cosine and Discrete Wavelet Transforms have been researched and compared based on their embedding efficiency and fidelity. A video steganography program has been developed in the Java programming language with all of the researched methods implemented for experiments. The experiments used 3 video containers with different amounts of movement. The impact of the movement has been addressed in the paper as well as the ways of potential improvement of embedding efficiency using adaptive embedding based on the movement amount. Results of the research have been verified using a survey with 17 participants.
The paper focuses on development of requirements specification for steganographic systems. The main concepts and fields of use of steganography are briefly explained. Criteria that can be used for various non-functional requirements are grouped and their possible metrics are given with examples and sample requirements. The authors provide an original systematic approach to develop requirements for steganographic systems based on the field of use and the importance of each criterion in the selected field. The approach also allows for automated selection of steganographic algorithms based on the requirements and is related to the concept of the Universal Stegoconstructor, which guarantees that clients receive the required steganographic system from the developers.