The relative l ow level of smart home system (SHS) device information security may threatenthe privacy of users. In this paper, we propose a homomorphic consortium blockchain for SHS sensitivedata privacy preserving (HCB HCB-SDPP)SDPP), which is based on the tra ditional smart h ome system. We addverification services services, which are composed of verification nodes nodes, to our model to verify working nodes andtransactions in SHS. In order to record SHS device information transaction, we propose a new block datastructure based on Homomorp hic encryption ( HEBDSHEBDS). Using HCB HCB-SDPP model, we design an encryptedalgorithm based on Paillier encrypted for privacy protection. To verify the validity of th e HCB HCB-SDPP model,we firstly encrypt sensitive data of all gateway peerspeers, and upload them to the consortium blockchain . Thenwe validate the security of sensitive data after homomorphic encryption processing. In the experiment , wealso design attack experiment experiments to attack different types of peers on the consortium blockchain in HCB HCB-SDPP model. If the these nodes are insecure, the influence on the whole model will be analyzed analyzed. Simulationresult show shows that HCB HCB-SDPP model can protect customer privacy more effectively than SHS.
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