Wideband GSM Sniffing
- Type
- Video
- Tags
- GSM, sniffer
- Authors
- Karsten Nohl, Sylvain Munaut
- Event
- Chaos Communication Congress 27th (27C3) 2010
- Indexed on
- Mar 27, 2013
- URL
- http://mirror.fem-net.de/CCC/27C3/mp4-h264-HQ/27c3-4208-en-wideband_gsm_sniffing.mp4
- File name
- 27c3-4208-en-wideband_gsm_sniffing.mp4
- File size
- 511.3 MB
- MD5
- a8b938ebba4492f6c2166f71c398ba2c
- SHA1
- f392bf1f2cdc66a99fab9cc47f556ba2d072f293
GSM is still the most widely used security technology in the world with a user base of 5 billion and a quickly growing number of critical applications. 26C3's rainbow table attack on GSM's A5/1 encryption convinced many users that GSM calls should be considered unprotected. The network operators, however, have not woken up to the threat yet. Perhaps the new capabilities to be unleashed this year – like wide-band sniffing and real-time signal processing – will wake them up. Now that GSM A5/1 encryption can be cracked in seconds, the complexity of wireless phone snooping moved to signal processing. Since GSM hops over a multitude of channels, a large chunk of radio spectrum needs to be analyzed, for example with USRPs, and decoded before storage or decoding. We demonstrate how this high bandwidth task can be achieved with cheap programmable phones.
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