中文摘要：

针对认知无线电网络中出现的模仿主用户攻击问题，提出一种基于HASH匹配技术的解决方案。当主用户网络工作时，主用户基站在要传输的数据上附加用于HASH计算的原始数据，然后将它们发送出去，认知用户先对接收到的那些原始数据做HASH计算，然后将计算结果同预先保留的HASH值相比较。如果匹配成功，则证明有主用户出现。方案充分利用HASH函数计算速度快的特点，保证认知用户及时切换频谱，避免干扰主用户正常工作，利用HASH函数单向不可逆的特点保证了方案的安全性。给出了具体的设计方案。通过与相关方案比较，该方案具有安全、高效、可行的特点，能有效解决认知用户网络中出现的模仿主用户攻击问题。

英文摘要：

To solving the threat to the primary user emulation （PUE） in cognitive radio networks,this paper presented a security scheme based on HASH matching technique. In this scheme, when primary user network was working, we added the HASH original data to the data sent by primary user base station, firstly secondary users used HASH function to calculate those received original data,and then compared results with predistribution HASH values. Successful matching proved that the message of primary user emergency was true. This scheme made the best of the HASH characteristic of quickly calculating,which guaranteed timely spectrum handoff of secondary users and avoided interfering with primary user. The security of this scheme was guaranteed by the irreversible of one-way HASH function. The detail of the scheme was presented in this paper. Comparing with relevant schemes, it provides safety, efficiency and feasibility, and can effectively solve primary user emulation problem in cognitive radio networks.