Research On Privacy Preserving Dynamic Spectrum Auction Scheme

The rapid development of wireless communication technology makes the importance of wireless spectrum increasing day by day.Wireless spectrum resources are a shortage of public resources that can not be regenerated.How to effectively allocate and use this resource is becoming a hot research field in academia and industry.Auction has the characteristics of high efficiency and fairness.Therefore,the auction is widely used to solve the problem of spectrum resource allocation.Spectrum auction borrows the auction method in economics to allocate idle spectrum,which is an effective method to realize spectrum sharing at present.The challenge of spectrum auction design is to satisfy both truthfulness and spectrum reuse.The former encourages users to bid on the true valuation of the spectrum without cheating so as to ensure the fairness and efficiency of the auction.The latter indicates that one frequency channel can be assigned to multiple users at the same time,which will increasing spectrum utilization.However,spectrum reusability will undermine the truthful of the traditional auction design attributes.At the same time,spectrum reuse makes it harder to find efficient distribution schemes.Although the existing spectrum allocation scheme alleviates the shortage of spectrum resources to a certain extent,there are some shortcomings.For one thing,the existing truthful spectrum auction mechanism for the one-way spectrum allocation scenario does not consider spectrum reuse,which does great harm to spectrum utilization.For another,most of the existing research focuses on satisfying the truth attributes.However,the user's private information is not effectively protected and the protection measures are not perfect,cause the user's privacy security can not be effectively guaranteed.In order to ensure truthful and security of the spectrum auction,by combining the homomorphic encryption and garbled circuits technology,this paper proposes a secure and efficient spectrum auction scheme for distributing the scarcity spectrum resources.Specifically,the innovative contribution of this paper includes the following aspects:(1)For the first time,the homomorphic encryption and garbled circuits are combined in the single-sided homomorphic spectrum auction scheme.This combination can greatly inhibit the leakage of private information that may occur during the auction and protect the user's privacy,to avoid the auction information is used by unscrupulous users or auctioneers to obtain high profits.(2)Increase the efficiency of spectrum auction protection.Although the garbled circuits can achieve the safe operation of the entire auction,but the circuit of buyer grouping is more costly,the homomorphic encryption technology is introduced to protect the packet operation and the protection efficiency of the whole scheme is improved.The emulation experimental results show that,compared with the original spectrum auction scheme which does not protected,the proposed scheme can improve auction efficiency and spectrum utilization.(3)To solve the problem that the location information of the buyer may be leaked,a location protection mechanism is proposed based on the bid protection mechanism.The simulation results show that the mechanism can not only protect the buyer's location information but also perform the auction process efficiently.