Title :
An efficient hierarchical rights authorization scheme for offline content protection
Author :
Ouyang Qian ; Gao Qiang ; Liu Yi-guang ; Huang Zhao-ting
Author_Institution :
Sch. of Electron. & Inf. Eng., Beihang Univ., Beijing
Abstract :
Digital rights management (DRM) technology aims to distribute digital contents to users in a controlled manner that can protect the copyright of contents. Most previous DRM schemes do not consider user relations and content relations, thus it results in inefficiency and produces much overhead. In this paper, an efficient hierarchical rights authorization scheme for offline content protection (HRAS) is proposed in distance education system of university/college. Based on certain hierarchical rights relations of users and course contents in distance education system, a logical key graph is constructed in HRAS and two algorithms are designed respectively to construct the key graph. A comparison with other DRM schemes has shown that HRAS is efficient and has low overhead.
Keywords :
authorisation; computer aided instruction; copyright; cryptography; digital rights management; graph theory; content relation; digital rights management technology; distance education system; hierarchical rights authorization scheme; hierarchical rights relation; logical key graph; offline content protection; Algorithm design and analysis; Authorization; Computer science education; Content management; Cryptography; Distance learning; Licenses; Protection; Public key; Technology management;
Conference_Titel :
IT in Medicine and Education, 2008. ITME 2008. IEEE International Symposium on
Conference_Location :
Xiamen
Print_ISBN :
978-1-4244-3616-3
Electronic_ISBN :
978-1-4244-2511-2
DOI :
10.1109/ITME.2008.4743830
