Abstract
Online social networks (OSNs) have shown rapid growth in the past decade and are consistently growing at a high rate. OSNs provide an efficient way of performing online social interactions, data sharing, and multimedia communications with millions of internet users. Along with the advantages, OSNs also raise some security and privacy challenges. Currently, available sharing mechanisms can protect data associated with a single user but lack in protecting data associated with multiple users. Considering privacy issues related to multiparty online objects, this research proposes a collaborative sharing model that works on the principles of joint sharing to fulfill privacy needs of OSN users on shared objects. The proposed model follows multiparty authorizations, the socio-technical concepts of joint sharing, and joint-ownership policy enforcement mechanism. It also supports a fine-grained automated conflict resolution method for jointly owned objects. Formal verification of the proposed model is performed through Petri-nets, its semantics are validated through ontologies, while a third-party Facebook application is developed for proof of concept. The analysis of users’ response, performed through the technology acceptance model (TAM), reflects an 81% acceptance of the proposed joint sharing model.
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