An ID-Based Group Key Agreement Scheme for Controlling Access and Privacy in Cloud

Abstract

As the population of cloud service, more and more people concerns the privacy and security of cloud service. Therefore, an ID-based group key agreement scheme is proposed. In this paper, the group key agreement scheme is applied to the access control of cloud service. For achieving the access control and the privacy of data, the data owner can determine who can decrypt the encrypted data. In the aspect of computation cost, the bilinear pairing is used to compute the session key and the symmetric encryption is used to encrypt data in the scheme because of the bilinear pairing and symmetric encryption have lower computation cost than others. In the aspect of security, the scheme proposed in this paper not only can assist two attacks: impersonation attack and man-in-the-middle attack, but also can satisfy four security attributes: known-key security, key control, unknown key-share and key compromise impersonation.