Content authentication method for extended home multimedia and personal cloud services

For efficient and easy content sharing between consumer devices, various network technologies like Peer-to-Peer (P2P) and DLNA have been applied to content sharing services. Recently, as content-centric networking (CCN) comes into the spotlight as a future Internet architecture, CCN-based content sharing model like a virtual personal community service was newly introduced. One of the main characteristics of both P2P and CCN is to make it possible to retrieve contents host-independently by separating identity from location. Since such a characteristic also makes it possible that a content object can be delivered from unspecified devices/hosts with the replicas of the content object, receivers can´t confirm the practical providers of the received content object. Hence, it is always a hot issue how to check the correctness and the integrity of a content object which is sent from the unknown devices/hosts. In this paper, we propose a content authentication method using bit-XOR operation in order that users can authenticate a content object transmitted through P2P/CCN. The performance analysis shows that the proposed scheme can reduce both computation and communication overheads so that it can be applied to mobile environments as well as home media services.