Design And Implementation Of Bluetooth Secure Transmission System Based On PUF

With the continuous development of bluetooth technology,its application range extends from traditional point-to-point file transmission and voice communication to the field of Internet of Things,such as medical monitoring,indoor positioning and smart home.And bluetooth has shown a high military application value.However,the openness of wireless channel makes bluetooth inherently threatened with security attacks.Although the Bluetooth Specification provides certain security mechanisms,it still has flaws and can't meet the needs of the military field,which also limits the further development of bluetooth in military applications.Physical Unclonable Function(PUF)is a special mapping relationship based on the hardware characteristics of the device,which is expressed as “hardware fingerprint”.With the features of being lightweight,low-cost and unpredictable,PUF has a broad application prospect in the field of information security.Through the in-depth study of existing bluetooth security mechanisms,we summarize the security flaws of bluetooth.And combined with the application requirements in the military field,the bluetooth security enhancement model and the message security transmission architecture are established.On this basis,we design the PUF-based Bluetooth Fingerprint Mapping Generator(PBFMG)and the security transmission schemes for point-to-point messages and multicast messages.Then the PUF-based bluetooth secure transmission prototype system is implemented.According to the requirement of bluetooth secure transmission,a high-stability PUF implementation scheme is proposed.Based on this,the PBFMG is designed.The PBFMG can be used to extract the underlying hardware characteristics of the device and establish an unclonable mapping relationship between the input parameters and the output parameters,which provides support for the implementation of secure transmission schemes.Aiming at the problem of secure transmission of point-to-point messages in bluetooth network,we propose a PBFMG-based scheme according to the bluetooth security enhancement model.In the proposed scheme,peripheral devices don't need to store any secret parameters.And the scheme provides protection against copy attacks while resisting traditional link security threats.Compared with similar schemes,the proposed scheme has less communication,computation and storage overheads,which can meet the demand for point-to-point secure transmission of bluetooth devices.Aiming at the problem of secure transmission of multicast messages in bluetooth network,a group key transfer mechanism based on PBFMG is proposed.On this basis,a secure transmission scheme is implemented,which uses the PBFMG parameters to hide the group key information and implements the secret allocation of the group key by constructing a polynomial.Its security can be attributed to the unclonability and unpredictability of PBFMG,as well as the difficulty of large number decomposition.The proposed scheme achieves higher security with fewer resource overheads,which ensures the secure transmission of bluetooth multicast messages.Based on the research above,the PUF-based bluetooth security transmission prototype system is implemented combining levels of hardware,firmware and software,according to the message security transmission architecture.Then,the system's various functions are tested.Results show that the PBFMG has good properties,which achieves the expected design goals,and the proposed schemes are feasible and effective to ensure the security of data in the bluetooth channel.The research content of this article is conducive to enhancing the security transmission capability of bluetooth,which lays a theoretical foundation for its application and development in the field of military.