In this talk from the DeepSec 2011 security conference Laurent ‘Kabel’ Weber, co-founder of the Chaos Computer Club in Berlin, details the enhanced scapy software tool to attack GSM via packet manipulation. This presentation introduces a scapy-addon allowing users to create GSM layer 3 packets using simple Python syntax. His hardware setup includes a USRP1 […]
Tag Archives: OpenBTS
Lessons learned with an external clock / USRP1 interface
In order to use even a high-priced SDR for GSM experimentation, an accurate clock source is indispensable. According to the GSM standard, a clock with “absolute accuracy better than 0.05 ppm for both RF frequency generation and clocking the timebase” is required. This means that with a standard USRP1 with frequency accuracy of 2.5 ppm, […]