Secure data deduplication scheme based on distributed random key in integrated networks
Hui Ying Qi, Yingjie Han, Xiaoqiang Di, Fang Sun · 2017
With the progress in space technologies, the future integrated network incorporating ground internet and spatial network is emerging as the times require. The particularity of space application requires secure transmission and storage of mass data. These data contain a lot of repeating data, which occupy an enormous storage space and many network bandwidth resources. How to efficiently delete the repeating data while ensuring the data confidentiality poses a great challenge to the data deduplication technology. This paper proposes a secure data deduplication scheme to be implemented in the integrated network. In this scheme, many key servers are distributed into the entire network so that the client can be linked to several nearby key servers at any time. Then a key generated by a key server is chosen randomly. The key fingerprint is saved to the key fingerprint server to ensure that the data with the same attributes can be encrypted by the same key for the purpose of ciphertext deduplication. The theoretical analysis shows that, compared with DupLESS and threshold blind signature, this scheme improves the security of the deduplication system, avoids a single point of failure, simplifies the signature verification, and thus reduces the computational overhead at the client side.