Beamforming Feedback As a Novel Attack Surface for Wi-Fi Physical-Layer Security

With the rapid evolution of wireless technologies, Wi-Fi has expanded beyond its original role in data transmission to support various emerging applications, particularly in physical-layer security, including device authentication, user authentication, and secret key generation. Despite extensive...

Channel Prediction-Based Physical Layer Authentication under Consecutive Spoofing Attacks

Wireless networks are highly vulnerable to spoofing attacks, especially when attackers transmit consecutive spoofing packets. Conventional physical layer authentication PLA methods have mostly focused on single-packet spoofing attack. However, under consecutive spoofing attacks, they become...

SoK: Security Evaluation of Wi-Fi CSI Biometrics: Attacks, Metrics, and Systemic Weaknesses

Wi-Fi Channel State Information CSI has been repeatedly proposed as a biometric modality, often with reports of high accuracy and operational feasibility. However, the field lacks a consolidated understanding of its security properties, adversarial resilience, and methodological consistency. This...

Enhancing Resilience against Jamming Attacks: a Cooperative Anti-Jamming Method Using Direction Estimation

The inherent vulnerability of wireless communication necessitates strategies to enhance its security, particularly in the face of jamming attacks. This paper uses the collaborations of multiple sensing nodes SNs in the wireless network to present a cooperative anti-jamming approach CAJ designed t...

CSI2Dig: Recovering Digit Content from Smartphone Loudspeakers Using Channel State Information

Eavesdropping on sounds emitted by mobile device loudspeakers can capture sensitive digital information, such as SMS verification codes, credit card numbers, and withdrawal passwords, which poses significant security risks. Existing schemes either require expensive specialized equipment, rely on...

Wi-Fi Signal Interference Can Leak Your Passwords and Keystrokes

Hackers can steal your sensitive information, such as your Passwords, PINs and Keystrokes, from your phone by observing changes in the wireless signal as you enter them into your smartphones. A group of researchers from the Shanghai Jaio Tong University, the University of South Florida and the...

Keystroke Recognition Uses Wi-Fi Signals To Snoop

A group of academic researchers have figured out how to use off-the-shelf computer equipment and a standard Wi-Fi connection to sniff out keystrokes coming from someone typing on a keyboard nearby. The keystroke recognition technology, called WiKey, isn’t perfect, but is impressive with a reporte...