Efficient Identity-Based Key Management for Configurable Hierarchical Cloud Computing Environment

The security of cloud computing data centers is an important issue. In recent years, some schemes of encryption and authentication based on hierarchical identity-based key management systems have been developed. However, these schemes did not consider the case when PKG (Private Key Generator) went down. In this paper, we proposed an identity-based key management scheme for configurable hierarchical cloud computing environment. The proposed scheme requires fewer computations on encryption, and authentication, and it also provides efficient key reconstruction in case of PKG failures. As a result, the scheme proposed in this paper can reduce the key reconstructing cost efficiently on cloud computing data center.