During the Hackaday superconference held during November 2017, Samy Kamkar presented a talk on how he reverse engineers devices, and in particular passive entry and start systems in vehicles. In the talk he also explains what tools he uses which includes SDRs like the HackRF One and RTL-SDR dongle and explains the methodology that he takes when looking at how to reverse engineer any new device. Samy is most famous for writing the Samy MySpace computer worm and also popularizing the "RollJam" wireless car door vulnerability. The talk blurb reads:
In this talk Samy Kamkar shares the exciting details on researching closed systems & creating attack tools to (demonstrate) wirelessly unlocking and starting cars with low-cost tools, home made PCBs, RFID/RF/SDR & more. He describes how to investigate an unknown system, especially when dealing with chips with no public datasheets and undisclosed protocols. Learn how vehicles communicate with keyfobs (LF & UHF), and ultimately how a device would work that can automatically detect the makes/models of keyfobs nearby. Once the keyfobs have been detected, an attacker could choose a vehicle and the device can wirelessly unlock & start the ignition. Like Tinder, but for cars.