Summary: The Benefits and Challenges of Providing
Content Protection in Peer­to­Peer Systems
Paul Judge and Mostafa Ammar
College of Computing, Georgia Institute of Technology, Atlanta, GA 30332
fjudge,ammarg@cc.gatech.edu 
Abstract
There is an increased interest, by content creators and owners, in content protection systems that provide the
ability to control or restrict the content that can be shared on peer­to­peer file sharing systems. At the same time,
there is much debate that argues that content protection in peer­to­peer systems will unfairly restrict the users'
ability to share content. We explore the issue of content protection in peer­to­peer systems. We examine the ben­
efits that it would provide to many parties including peer­to­peer network operators, individual and institutional
content providers, and ultimately end­users. We then examine the challenges involved--the often conflicting goals
of content providers and users. We explore how a content protection system can maintain the features that interest
end­users such as an open peer­to­peer sharing experience, privacy, and flexible business models. We outline the
design objectives of such a protection system. We discuss how previous attempts at content protection in peer­to­
peer systems only supported basic business models and show how protection systems can provide the flexibility
necessary to support common content distribution business models. We explain the design space and examine
proposed systems for centralized and decentralized content protection systems.
1 Introduction
Peer­to­peer file sharing systems allow content to be shared between distributed end­systems or peers. Files are

Source: Ammar, Mostafa - College of Computing, Georgia Institute of Technology

Collections: Computer Technologies and Information Sciences