现有物理层挑战-响应认证机制使用无线信道信息掩藏密钥生成认证响应,一旦攻击方获得合法信道信息,则可直接破解密钥。针对上述问题,该文借鉴曲线匹配原理,提出一种基于哈希方法的物理层认证机制。首先,认证双方提取无线信道特征,并和...现有物理层挑战-响应认证机制使用无线信道信息掩藏密钥生成认证响应,一旦攻击方获得合法信道信息,则可直接破解密钥。针对上述问题,该文借鉴曲线匹配原理,提出一种基于哈希方法的物理层认证机制。首先,认证双方提取无线信道特征,并和认证密钥组合得到初始认证向量,该向量被等效为一条曲线;随后,采用具有容错性的单向哈希函数将该曲线映射为低维的哈希矢量,用作认证响应;最后,认证方根据需求设置认证门限,并根据响应的匹配结果进行判决。性能分析表明,所采用的哈希方法实质为欠定方程组,攻击方无法根据低维哈希矢量还原曲线信息,从而无法破解密钥;仿真结果表明,在攻击方窃取了合法信道信息的条件下,在4 d B时,现有挑战-响应机制攻击率约为0.5,该文所提机制可实现攻击率小于510-。展开更多
The properties of broadcast nature, high densities of deployment and severe resource limitations of sensor and mobile networks make wireless networks more vulnerable to various attacks, including modification of messa...The properties of broadcast nature, high densities of deployment and severe resource limitations of sensor and mobile networks make wireless networks more vulnerable to various attacks, including modification of messages, eavesdropping, network intrusion and malicious forwarding. Conventional cryptography-based security may consume significant overhead because of low-power devices, so current research shifts to the wireless physical layer for security enhancement. This paper is mainly focused on security issues and solutions for wireless communications at the physical layer. It first describes the RSSI-based and channel based wireless authentication methods respectively, and presents an overview of various secrecy capacity analyses of fading channel, MIMO channel and cooperative transmission, and then examines different misbehavior detection methods. Finally it draws conclusions and introduces the direction of our future work.展开更多
Radio Frequency(RF) fingerprinting is one physical-layer authentication method for wireless communication, which uses the unique hardware characteristic of the transmitter to identify its true identity.To improve the ...Radio Frequency(RF) fingerprinting is one physical-layer authentication method for wireless communication, which uses the unique hardware characteristic of the transmitter to identify its true identity.To improve the performance of RF Fingerprint(RFF)based on preamble with fixed duration, a nonlinear RF fingerprinting method based on payload symbols is proposed for the wireless OFDM communication with the bit mapping scheme of QPSK. The wireless communication system is modeled as a Hammerstein system containing the nonlinear transmitter and multipath fading channel. A parameter separation technique based on orthogonal polynomial is presented for the estimation of the parameters of the Hammerstein system. The Hammerstein system parameter separation technique is firstly used to estimate the linear parameter with the training signal, which is used to compensate the adverse effect of the linear channel for the demodulation of the successive payload symbols. The demodulated payload symbols are further used to estimate the nonlinear coefficients of the transmitter with the Hammerstein system parameter separation technique again, which is used as the novel RFF for the authentication of the QPSK-OFDM device. Numerical simulations have verified the proposed method, which can also be extended to the OFDM signals with other bit mapping schemes.展开更多
Most of the existing physical layer watermarking authentication schemes are based on a single-input single-output system and require pre-issue of shared keys.To address these problems,in this thesis,a physical layer a...Most of the existing physical layer watermarking authentication schemes are based on a single-input single-output system and require pre-issue of shared keys.To address these problems,in this thesis,a physical layer authentication scheme without the distribution keys is proposed based on the constellation dithering physical layer authentication watermarking mechanism with a multiple-input multiple-output(MIMO)system,and space-time block coding(STBC)is used to improve the robustness of transmission.Specifically,the legitimate node obtains channel state information(CSI)through channel probing and couples CSI with the message signal using a hash function to generate an authentication tag,which is then embedded through constellation dithering.The receiver extracts the tag and authenticates it using hypothesis testing.Performance analysis shows that the scheme is resistant to various attacks such as replay,interference,tampering,and forgery.Simulation results show that the use of MIMO multi-antenna diversity with STBC coding technique reduces the bit error rate(BER)of message signals and tag signals and improves the detection rate of legitimate signals.展开更多
在分析现有基于(EPC Class 1Gen,2EPCGen2)标准的轻量级RFID相互认证协议的基础上,提出了一种符合EPCGen2标准的基于射频指纹的RFID认证协议。协议融合了RFID设备的物理层信息,实现了RFID标签的跨层融合认证,具有增强RFID系统安全强度...在分析现有基于(EPC Class 1Gen,2EPCGen2)标准的轻量级RFID相互认证协议的基础上,提出了一种符合EPCGen2标准的基于射频指纹的RFID认证协议。协议融合了RFID设备的物理层信息,实现了RFID标签的跨层融合认证,具有增强RFID系统安全强度的特点。分析显示,提出协议具有相互认证、私密性、防止重放攻击、防止去同步攻击等安全性能,尤其能有效对抗RFID标签的克隆攻击。展开更多
文摘现有物理层挑战-响应认证机制使用无线信道信息掩藏密钥生成认证响应,一旦攻击方获得合法信道信息,则可直接破解密钥。针对上述问题,该文借鉴曲线匹配原理,提出一种基于哈希方法的物理层认证机制。首先,认证双方提取无线信道特征,并和认证密钥组合得到初始认证向量,该向量被等效为一条曲线;随后,采用具有容错性的单向哈希函数将该曲线映射为低维的哈希矢量,用作认证响应;最后,认证方根据需求设置认证门限,并根据响应的匹配结果进行判决。性能分析表明,所采用的哈希方法实质为欠定方程组,攻击方无法根据低维哈希矢量还原曲线信息,从而无法破解密钥;仿真结果表明,在攻击方窃取了合法信道信息的条件下,在4 d B时,现有挑战-响应机制攻击率约为0.5,该文所提机制可实现攻击率小于510-。
基金supported in part by State Key Program of National Nature Science Foundation of China under Grant No.60932003National High Technical Research and Development Program of China (863 Program ) under Grant No.2007AA01Z452
文摘The properties of broadcast nature, high densities of deployment and severe resource limitations of sensor and mobile networks make wireless networks more vulnerable to various attacks, including modification of messages, eavesdropping, network intrusion and malicious forwarding. Conventional cryptography-based security may consume significant overhead because of low-power devices, so current research shifts to the wireless physical layer for security enhancement. This paper is mainly focused on security issues and solutions for wireless communications at the physical layer. It first describes the RSSI-based and channel based wireless authentication methods respectively, and presents an overview of various secrecy capacity analyses of fading channel, MIMO channel and cooperative transmission, and then examines different misbehavior detection methods. Finally it draws conclusions and introduces the direction of our future work.
文摘Radio Frequency(RF) fingerprinting is one physical-layer authentication method for wireless communication, which uses the unique hardware characteristic of the transmitter to identify its true identity.To improve the performance of RF Fingerprint(RFF)based on preamble with fixed duration, a nonlinear RF fingerprinting method based on payload symbols is proposed for the wireless OFDM communication with the bit mapping scheme of QPSK. The wireless communication system is modeled as a Hammerstein system containing the nonlinear transmitter and multipath fading channel. A parameter separation technique based on orthogonal polynomial is presented for the estimation of the parameters of the Hammerstein system. The Hammerstein system parameter separation technique is firstly used to estimate the linear parameter with the training signal, which is used to compensate the adverse effect of the linear channel for the demodulation of the successive payload symbols. The demodulated payload symbols are further used to estimate the nonlinear coefficients of the transmitter with the Hammerstein system parameter separation technique again, which is used as the novel RFF for the authentication of the QPSK-OFDM device. Numerical simulations have verified the proposed method, which can also be extended to the OFDM signals with other bit mapping schemes.
基金supported by the National Key Research and Development Program of China(No.2017YFE0135700)the High Level Talent Support Project of Hebei Province(No.A201903011)+3 种基金the Natural Science Foundation of Hebei Province(No.F2018209358)the Tsinghua Precision Medicine Foundation(No.2022TS003)the Ministry of Education and Science(MES)for NCDSC,part of the Bulgarian National Roadmap on RIs(No.D01-387/18.12.2020)the Telecommunications Research Centre(TRC)of University of Limerick,Ireland.
文摘Most of the existing physical layer watermarking authentication schemes are based on a single-input single-output system and require pre-issue of shared keys.To address these problems,in this thesis,a physical layer authentication scheme without the distribution keys is proposed based on the constellation dithering physical layer authentication watermarking mechanism with a multiple-input multiple-output(MIMO)system,and space-time block coding(STBC)is used to improve the robustness of transmission.Specifically,the legitimate node obtains channel state information(CSI)through channel probing and couples CSI with the message signal using a hash function to generate an authentication tag,which is then embedded through constellation dithering.The receiver extracts the tag and authenticates it using hypothesis testing.Performance analysis shows that the scheme is resistant to various attacks such as replay,interference,tampering,and forgery.Simulation results show that the use of MIMO multi-antenna diversity with STBC coding technique reduces the bit error rate(BER)of message signals and tag signals and improves the detection rate of legitimate signals.
文摘在分析现有基于(EPC Class 1Gen,2EPCGen2)标准的轻量级RFID相互认证协议的基础上,提出了一种符合EPCGen2标准的基于射频指纹的RFID认证协议。协议融合了RFID设备的物理层信息,实现了RFID标签的跨层融合认证,具有增强RFID系统安全强度的特点。分析显示,提出协议具有相互认证、私密性、防止重放攻击、防止去同步攻击等安全性能,尤其能有效对抗RFID标签的克隆攻击。
