Abstract: Copyright infringement cases often occur while the digital music business becomes booming. The MP3-based online music is downloaded and disseminated freely, so the copyright of MP3 must be protected urgently. According to the existing DRM protection technologies and solutions, a MP3 audio file DRM protection scheme based on Windows mobile system was designed. The solution doesn't require analysis of the process of MP3 encoding and decoding, only by analyzing the structure of MP3 files, and combining the technology of AES encryption algorithm, encrypts the file in struck When the content is packaged, it should be uploaded to the service platform and downloaded by the user. The user uses the DRM technology of AES decryption, license strategy, digital signature, CA certificate to finish real-time decryption play. The experiment shows that the scheme has the features of high security and real-time,and encryption is fast,which can be well applied to mobile terminal music copyright protection, achieving the purpose of the digital copyright protection.

Key words: Digital rights management, MP3 , License, Data encryption