Hacking Layer Zero

Hacking Layer Zero examines the transmission and reception domain below the OSI physical layer. At this level signals exist before framing or modulation, and their behavior determines whether higher layer protections activate. The book explains why this domain remains a blind spot and why the gap has grown important as wireless and short range links expand in enterprise and operational technology settings.

Readers learn the physics of signal propagation and the capture methods needed to observe transmissions without detection. Later chapters detail attack surfaces in WiFi, Bluetooth Low Energy, infrared systems, and NFC/RFID protocols for access control and inventory. Replay and injection techniques sit alongside electronic warfare methods for jamming and denial. Wired media interception shows how copper and fiber links can be accessed without raising alarms.

Defensive chapters focus on hardware and protocol choices that make interception and replay harder. Guidance covers firmware practices along with removal of default advertisement modes to support segmentation for operational technology. Large scale passive survey data illustrates how often legacy weaknesses persist in production equipment. A final chapter addresses how new technologies will reshape the transmission layer and what steps organizations can take now.

Security practitioners, hardware designers, and physical security teams obtain a coherent framework for the layer where most wireless and proximity attacks begin. They finish with concrete offensive methods and the design steps that reduce exposure before signals reach higher layer controls.