Redistributing time-based rights between consumer devices for content sharing in DRM system

Abstract

Device-based digital rights management (DRM) systems tightly bind rights for content to a device. However, it can decrease the consumers' convenience because it disturbs consumers who want to use the already purchased content with their other devices freely. Previous research into solving this problem still have burdens such as restricting the number of devices that a consumer can use and requiring a special device that manages content sharing. In this paper, we propose a new rights sharing scheme which does not restrict the number of devices that a consumer can use and does not require a specialized device. In our scheme, the right to use content is represented as the right to use the content for a certain amount of time. Consumers can use the content with any of their devices by redistributing the usage amount of time between devices. The redistribution process only requires local synchronization among participating devices. To prevent illegal content sharing and to detect illegally increased content usage time, the amount of time that a consumer can have is limited and the rights for each unit of time has a unique number to prevent illegal duplications. We present data structures and protocols, analyze security properties of our scheme, compare our scheme with related work, and evaluate our scheme through implementation.

Digital Rights Management and Access Control in Multimedia Social Networks

“…In this personal DRM system, the end-users can set the digital license independently and transfer licenses between devices freely, so as to protect the personal digital content. In addition, [14] proposed a secondary distribution plan and the relevant security protocol based the content using time between devices. This research was a useful attempt to share the time elements in the digital rights; and it also broadened the view of research on the shared digital rights.…”

Usage Control Model for Digital Rights Management in Digital Home Networks

“…On temporal rights sharing, Lee made an interesting investigation on a re-distribution approach and secured protocol among front-end user devices. The effort is of significance in the extension of digital rights sharing [26]. Feng and Tang adopted Ergodic Encryption and machine authentication to share purchased license, significantly reducing the overhead due to dependence on the authorized domain [27].…”

A Novel Approach to Digital Contents Sharing for Digital Home Network

“…There are several ways of allowing differentiation for rights within a domain [13][14][15][16]. A straightforward solution would be to introduce differentiations during the purchase of the rights when the user could immediately define different rights for different domain members and let content provider encode this in the licenses.…”