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[Author] KiSong YOON(2hit)

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  • A Modeling of Multilevel DRM

    SeongOun HWANG  KiSong YOON  KwangHyung LEE  

     
    LETTER-Fundamental Theories for Communications

      Vol:
    E88-B No:5
      Page(s):
    2168-2170

    The widespread use of the Internet raises issues regarding intellectual property. After content is downloaded, no further protection is provided on that content. DRM (Digital Rights Management) technologies were developed to ensure secure management of digital processes and information. In this paper, we present a multilevel content distribution model of which we present formal descriptions.

  • MPEG-2 Streaming Protection Scheme for Digital Rights Management

    Yeonjeong JEONG  Kisong YOON  Jaecheol RYOU  

     
    PAPER-Protocols, Applications and Services

      Vol:
    E87-D No:12
      Page(s):
    2594-2601

    In this paper, we propose an MPEG-2 TS encryption and decryption scheme which can support MPEG-2 TS streaming, and a key management scheme which can provide secure delivery of the key used to encrypt MPEG-2 TS from the package server to DRM clients in a secure manner. The key management scheme protects the key not only from purchasers but also among the other principals who manage the distribution servers and license servers. The proposed scheme can protect from attacks over a network since a pre-encrypted MPEG-2 TS is sent by a streaming server and only DRM clients can decrypt the streamed MPEG-2 TS. An MPEG-2 TS streaming server can send the encrypted stream without modifying it and degrading its performance because MPEG-2 TS is encrypted but compliant to the MPEG-2 TS format. The processing time to decrypt a streamed MPEG-2 TS in client systems is minimized to guarantee the quality of streaming.