@Article{cmc.2020.011567,
AUTHOR = {Jin Wang, Wencheng Chen, Lei Wang, R. Simon Sherratt, Osama Alfarraj, Amr Tolba},
TITLE = {Data Secure Storage Mechanism of Sensor Networks Based on  Blockchain},
JOURNAL = {Computers, Materials \& Continua},
VOLUME = {65},
YEAR = {2020},
NUMBER = {3},
PAGES = {2365--2384},
URL = {http://www.techscience.com/cmc/v65n3/40175},
ISSN = {1546-2226},
ABSTRACT = {As the number of sensor network application scenarios continues to grow, the 
security problems inherent in this approach have become obstacles that hinder its wide 
application. However, it has attracted increasing attention from industry and academia. 
The blockchain is based on a distributed network and has the characteristics of nontampering and traceability of block data. It is thus naturally able to solve the security
problems of the sensor networks. Accordingly, this paper first analyzes the security risks 
associated with data storage in the sensor networks, then proposes using blockchain 
technology to ensure that data storage in the sensor networks is secure. In the traditional 
blockchain, the data layer uses a Merkle hash tree to store data; however, the Merkle hash 
tree cannot provide non-member proof, which makes it unable to resist the attacks of 
malicious nodes in networks. To solve this problem, this paper utilizes a cryptographic 
accumulator rather than a Merkle hash tree to provide both member proof and nonmember proof. Moreover, the number of elements in the existing accumulator is limited 
and unable to meet the blockchain’s expansion requirements. This paper therefore
proposes a new type of unbounded accumulator and provides its definition and security 
model. Finally, this paper constructs an unbounded accumulator scheme using bilinear 
pairs and analyzes its performance.},
DOI = {10.32604/cmc.2020.011567}
}