Abstract
The insurance business plays a quite significant role in people's lives, but in the process of claim settlement, there are still various frauds such that the insurance companies' refusal to compensate or customers' malicious fraud to obtain compensation. Therefore, it is very important to ensure fair and just claims. In this paper, by combining the blockchain technology and the ciphertext-policy attribute-based encryption system, we build a scheme for secure storage and update for insurance records under the InterPlanetary File System (IPFS) storage environment in the insurance system. In this scheme, we use the fog node to outsource encryption of insurance records to improve the efficiency of the staff; In addition, we store encrypted insurance records on IPFS to ensure the security of the storage platform and avoid the single point failure of the centralized mechanism. In addition, we use the immutability of the blockchain to achieve the non-repudiation of both insurance companies and the client. The security proof shows that the proposed scheme can achieve selective security against selected keyword attacks. Our scheme is efficient and feasible under performance analysis and real data set experiments.
Highlights
With the improvement of the people’s life quality, various insurances have emerged at the historic moment
A fair and just insurance business can be achieved between the insurance company and the client
The heavy computing operations will reduce the efficiency of the staff, for the purpose of improving the staff’s efficiency, and reducing the client’s computing burden, it is a good choice to outsource the encryption and decryption of insurance records to fog nodes
Summary
With the improvement of the people’s life quality, various insurances have emerged at the historic moment. Storing the information of insurance records on the blockchain can ensure the originality of the data, and solve the security problem of the central authorization mechanism. In this way, a fair and just insurance business can be achieved between the insurance company and the client. Outsourcing encryption: We outsource a large amount of computations in the encryption and decryption process to the fog node, which reduces the computation amount of the staff and the client and improves work efficiency. The specific structure of our scheme is as follows: In the section II, we analyze the existing scheme, in the section III, we list the knowledge points that may be used in the scheme, in the section IV, we overview the system model of our scheme, the algorithm in our scheme is described in detail in the section V, and the security of our scheme is proved in the section VI, the performance of our scheme is analyzed in the section VII , and we are in the Section VIII summarizes our scheme
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