S2PD: A Selective Sharing Scheme for Privacy Data in Vehicular Social Networks

With the rapid growth of fifth-generation mobile networks and vehicle to everything communication technologies on Internet of vehicles, vehicular social networks (VSNs) present new research fields for content sharing, data dissemination, and delivery services. Data owners outsource valuable information in the public cloud and share with others. But for security consideration, the owners tend to encrypt the outsourced data and unwilling to share the decryption key. Thus, there is a dilemma: owners will risk privacy leakage by handing over the key while hiding the decryption key, and other users cannot share the data. In this paper, we propose and analyze a selective sharing scheme (S2PD) for vehicular data owners to share their sensitive data with some authorized data users in VSN. S2PD ensures different users acquiring different data with different privilege received from the data owners. In the scheme, the owners upload the privacy data encrypted by key pairs and let the cloud decode the encrypted data to half-decrypted when they need to share the data with some users; the authorized users download the half-decrypted data and decrypt it with a secret key sent by the sharing owners in a secure manner. Then, it protects the data leakage from the curious cloud server and other unauthorized data users. With the increasing data and sharing requests in VSN, compared with other five sharing scheme, experiments proved our scheme is practically efficient.