P2P 환경에서 개선된 콘텐츠 보안 시스템 설계 및 구현

Abstract

The word P2P implies significant changes in current business dynamics. The P2P service enables individuals to be connected to the Internet for provision information directly and even downloads from without the conventional method of passing through search engines. This can be utilized to extend the path of retrieving information from limited web sites to personal and enterprise databases. That is, it is now possible for individuals to manage their own information on a national or global scope, share various information with other members, form communities of users interested in sharing homogeneous information, and utilize remote conference and remote education using groupware. To incorporate protection to digital contents while they are distributed freely via networking, Microsoft, IntelTrust, and other firms have attempted to apply DRM. However, due to stagnation in the digital music and electronic document market, which constitute the initial market, increased complaints for content-owner oriented DRM technology, and incompatible DRM technologies between DRM providers led to the use of DRM only in very limited areas. Not only expression of content, but production,distribution, and transmission methods of consumption structure are all being developed unilaterally without much consensus. Thus content providers, managers, and users are faced with the task of solving the problem of compatibility. This thesis aims to design and implement a DRM system that would protect digital contents exchanged in P2P networks while retaining the freedom to exchange desired contents to and from networked computers. The copyright protection model suggested in the thesis uses relevant DRM technology to protect digital contents that are being distributed through P2P networks. The implemented DRM technology retains the characteristics of the network - free distribution and file sharing - and is structured to be cooperative with P2P technology. It also provides content owner verification, content authentication structure, content protection structure, indirect source acquisition effect, and indirect fee-charge effect which are the mandatory criterion for fee based models. To sustain the advantages of P2P technology, the model is structured to have paid services and free services run parallel to each other rather than implementing only paid service. The problems of current paid video and music services lie on the fact that the DRM server must have a constant connection with users. Realtime streaming download format induces increased traffic to DRM servers and content cutoffs. The suggested method acquiesces downloads while enforcing connection to DRM for authentication, decoding, and license downloading for cases of charged contents. This can retain the merits of P2P technology to its full extent while solving the biggest issue addressed: copyright problems.