Device Tracking via Linux’s TCP Source Port Algorithm Extended Research Paper
This paper reveals how a change in Linux’s TCP source-port selection algorithm unintentionally created a powerful device-tracking method. By studying how ports are generated, the authors show how a unique, stable device ID can be created—even across browsers, privacy modes, networks, and VPNs. The research also explains real-world tests, accuracy, limitations, and the security patch introduced in 2022.