Mi-Suk Huh

Privacy protected content sharing in extended home environment over Content-Centric Networking

Today, consumers possess a huge amount of personal contents due to increasing mobile devices and home appliances. This leads to extension of content sharing domain and thus, privacy protection of consumers becomes more important. In this paper, we propose a privacy protection mechanism providing the fine-grained access control on contents in the extended home environment. Our access control scheme is based on content encryption and supports a notion of groups and flexible access policy definition in content hierarchy using Access Control List (ACL). Though our proposed scheme is built on the hierarchical named content following CCN naming, it is also applicable to general hierarchies of named content or file systems as well.

Matrix network coding based multicast scheme over wireless multihop networks

With the explosive increase of smartphone users, multimedia-sharing applications requiring a high data rate multicast scheme over several-meters coverage range, e.g., video streaming and a smart class, are also rapidly emerging. In order to support such applications, matrix network coding based wireless multihop multicast scheme is proposed. The numerical evaluation results show that the proposed multihop multicast scheme gives significant performance improvement in the multicast rate and coverage. Moreover, the proposed scheme has good scalability to the network size, which is inherited from the property of network coding.

Secure virtual personal cloud service based on CCN/VPC

Content-centric networking based virtual private community (CCN/VPC) has been proposed for easy and secure content sharing between members in extended home domains. In this paper, we further introduce a virtual personal cloud (vpCloud) service based on CCN/VPC, and propose more scalable and intuitive membership management including enrollment process and member list-based association. The proposed enrollment and association mechanism are optimally designed for distributed consumer environment, whereof the service provider support is not necessary. We also propose a revocation process which is included in the membership management.

CAS key distribution model with revocation

To protect digital contents, CAS encrypts the contents with content encryption keys. Hence, it has been a main issue how to manage the content encryption keys efficiently as well as securely. To face this problem, CAS usually uses a hierarchical key structure and distributes the hierarchical keys to subscribers using smart cards. However, since the smart cards can be revoked so that the saved keys can also leak out, CAS should have a scheme to control the leak of the keys. In this paper, to control the revoked cards efficiently, we propose the key distribution model of CAS using a group key management scheme.