A secure regenerating code for the fault-tolerant of distributed networked storage

Regenerating code is a fault-tolerant technique based on the network coding. However, most of the researchers just focus on the construction of the codes, ignoring the security of the codes in application, especially the security in an extremely open environment such as cloud computing and cloud storage. A secure regenerating code, called SRCS is proposed in this paper to solve the fault-tolerant of distributed networked storage. SRCS achieves the security of the regenerating code using the threshold public-key encryption with low redundancy and high efficiency. In the storage system based on the SRCS, the data owner shares his private key to a set of key servers and uses the storage servers to stores the data. Even if the attacker compromises all storage servers, he can't get the data. It shows that SRCS is secure in the semi-adaptive model using decisional BDHE assumption.