Research On Coverless Information Hiding Technology Based On Computer Assisted Compositon

In recent years,with the rapid development of Internet technology,people pay more and more attention to the security issues in the process of information transmission.The emergence of coverless information hiding technology effectively guarantees that the information has good security and anti-attack in the process of concealed transmission,but the current research of coverless information hiding mainly focuses on the use of images and text as the carrier,based on the information of streaming media The development of hiding methods is still slow,and the type of carrier often limits the capacity of hidden information and the way information is disseminated.In this paper,the coverless information hiding method combines computer automatic composition and music information retrieval technology to stream media information hiding,and proposes a computer-aided composition coverless information hiding method,using music as the coverless information hiding carrier type to achieve The construction of music features driven by secret information,the final generation of secret media and the extraction of hidden information,the proposed method has good concealment,and has a good adaptability between the carrier specifications and the length of secret information.The main research work of this paper is as follows:In the research of carrierless information hiding with music as carrier,in order to realize the dense generation of music features,based on the single melody generation model of cyclic neural network in computer automatic composition technology and the theory of automatic chord arrangement,this paper proposes the loading of music rhythm sequence.The secret generation method,the musical pitch sequence loading secret generation method,and the single-melody music chord loading secret orchestration method combine the three musical feature loading secret generation methods to achieve secret information-driven music features(rhythm、pitch and chords),and finally use the generated music features to synthesize music audio to complete the construction of information hiding media.The information hiding method proposed in this paper takes advantage of the abstraction of music to realize the secret transmission of secret information in music,and compared with the image and text-based coverless information hiding carrier specifications,this method can flexibly adapt to the length of secret information and improve to adapt to hidden information.Due to the asymmetry of the hidden information and the extraction process,the music features cannot be directly extracted and decrypted from the audio.Based on the music information retrieval technology combined with the characteristics of the dense music features,the extraction methods of music rhythm,pitch and chord features are respectively carried out Research,and then extract the extracted music features through the rhythm sequence dictionary mapping,reproduce the sequence of pitch and chord generation method to extract the secret information hidden in the music feature and then restore the complete secret information to complete the hiding Information extraction.At the end of this paper,the concealment,robustness and hiding capacity of the coverless information hiding system are analyzed,and the results prove that the method proposed in this paper is very imperceptible.The hidden capacity of the system can be obtained by calculating the hidden capacity of the rhythm,pitch and chord of the music.Compared with the coverless information hiding method based on image and text,the method proposed in this paper has stronger information hiding ability,and very flexible and adaptable to hiding information.