Cooperative spectrum sensing location privacy protection method based on blockchain

Abstract

The invention discloses a cooperative spectrum sensing location privacy protection method based on a blockchain, which utilizes the anonymity of the blockchain to enable a secondary user to anonymously upload a sensing report to the blockchain, avoids the relevance between the sensing report and the secondary user, prevents a fusion center from associating the sensing report with the secondary user during decryption, and protects the security of the sensing report in the fusion process. The secondary user encrypts and signs the sensing report by using the elliptic curve cryptography technology, so that the sensing report is prevented from being stolen and tampered in the transmission process, and the confidentiality and integrity of the sensing report in the transmission process are ensured. According to the method, the sensing report is prevented from being replayed in the transmission process by using the timestamp, and the timeliness of the sensing report in the transmission process is ensured. According to the method, the automatic verification characteristic of a smart contract is utilized, and the smart contract, instead of the fusion center, automatically verifies the digital signature of the sensing report, so that the calculation overhead of the fusion center is reduced.

Description

technical field [0001] The present invention relates to the field of cognitive wireless network security, in particular to a block chain-based collaborative spectrum sensing location privacy protection method. Background technique [0002] Cooperative spectrum sensing is an effective method to solve the scarcity of spectrum resources in cognitive wireless networks. It allows unlicensed users (secondary users) to perceive the idle spectrum of licensed users (primary users), and use spectrum resources together without interfering with licensed users, thereby improving the utilization of spectrum resources and alleviating the problem of spectrum resource shortage . Cooperative spectrum sensing is generally divided into two scenarios: centralized and distributed. In a centralized scenario, there is a central control node - the fusion center and multiple secondary users. The fusion center is responsible for issuing spectrum sensing tasks and fusion analysis sensing reports. S...

AI Technical Summary

Problems solved by technology

The adversary (including the semi-trusted fusion center) can infer the location of the secondary user from the secondary user's perception report, and use data mining and other technologies to further speculate on other private information of the secondary user, such as personal preferences, living habits, religion, etc. Faith, etc., causing serious privacy leakage problems

In addition, during the transmission of the perception report, the perception report may also be subjected to replay attacks and tampering attacks, both of which will eventually lead to incorrect fusion results obtained by the fusion center and interfere with the normal operation of the cognitive wireless network.

[0004] The existing location privacy protection methods mainly use cryptography technology, but the calculation and communication overheads it brings are relatively large, and the practicability is poor.

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