Home IoT device management blockchain platform using smart contracts and a countermeasure against 51% attacks

초록

One of the important problems in Home IoT is security. Attempts to solve the security problem of Home IoT using blockchain have continued. Blockchain is evaluated as a good system for verifying the integrity of data in Home IoT. However, when using a blockchain in Home IoT, it is vulnerable to 51% attacks due to the small number of nodes in one Home IoT system. In this paper, we present a way to ensure Home IoT security and data integrity using smart contracts in blockchain-based Home IoT. It also suggests how users can defend against 51% attacks by setting their own consensus rate. It also investigates the relationship between the consensus rate set by the user and the hacker's attack success rate through simulation. Our suggestions and simulation results suggest how to control nodes when using blockchain for Home IoT and show how to be safe from 51% attack. Therefore, through this paper, a smart contract-based Home IoT blockchain can be configured, and only when the consensus rate is set and the agreement of each node exceeds the consensus rate can a safer network be configured through the preprocessing process. © 2022 ACM.

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