https://bit.ly/2sbx7Wa See the secret sale page at Djsoft.
In this video I show how to capture GSM traffic over the air, and decrypt parts of our own voice call. As frequency hopping is enabled in our case, a "test call" is decrypted subsequently, to show the full process until I get my new SDR, and record a new video. Please note that the pace in this video is quite fast at times, to keep the time on the video down a bit. It's also highly recommended to check out the previous videos, in case this is the first time you're doing GSM sniffing and decryption. Generally speaking, decoding voice where frequency/channel hopping is disabled/off, is almost the same as decrypting SMS's. The only difference is an extra step at the end, where the TCH/F channel is used for speech data. New topics covered in this video: - Voice calls decryption (Traffic channels (TCH/F), channel hopping, etc.) - RTL-SDR limitations in relation to frequency hopping - Decrypting the test call file by "Security Research Labs" Topics already covered in the SMS decryption video: - Switching USB mode on a Samsung Galaxy phone - ARFCN conversion to downlink and uplink frequencies - Testing the GSM downlink frequency - Capturing RTL-SDR GSM traffic for later use - Decoding RTL-SDR GSM traffic - GSM packets (Immediate Assignment, Cipher Mode Command, etc.) - Decrypting GSM traffic with a known Kc (symmetric encryption key) Tools: - usbswitcher (https://github.com/ud2/advisories/blob/master/android/samsung/nocve-2016-0004/usbswitcher.c) - minicom - kalibrate-rtl (kal) - grgsm_livemon - grgsm_capture - grgsm_decode - wireshark - vlc Hardware requirements: - RTL-SDR (Default antenna) for non-frequency hopping - Cellphone that has an AT interface you can access. Stay tuned and subscribe for more upcoming videos showing actual hacks! Twitter: @CrazyDaneHacker Facebook: https://www.facebook.com/crazydanishhacker Patreon: https://www.patreon.com/crazydanishhacker
