科研成果详情

Steganography based on musical notation is a branch of music-based information hiding, which has good steganographic transparency. However, the existing steganographic methods would inevitably reduce the quality of music scores for concealing secret messages. Thus, in this paper, we present four practical strategies for hiding information in different part of guitar tablatures, which can maintain the good quality of music scores and achieve excellent steganographic transparency. Specifically, the first one conceals the secret message into common guitar chord variations; the second and third ones embed the secret message in the fingerings for both hands; the last one hides the secret message into numeric symbols of numbered musical notation. Furthermore, we design an embedding strategy to determine cover positions dynamically in original guitar tablatures to further strengthen the steganographic security. We evaluate our scheme through theoretical analysis and comprehensive experiments. The results demonstrate that our scheme can achieve excellent security (providing huge key space for embedding security and inducing little distortion for embedding transparency) and good embedding capacity (i.e., 10-16 bits/measure).