Security in APCO P25 Networks - 2010

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The Latest Toy From EttusResearch!• USRP N210• Bigger FPGA, high quality ADC chip• Removed the SD card and replaced with onboard Flash RAM that isprogrammed over the ethernet interface at boot time.• $1700 for base unit + $450 for WBX daughterboard
GNURadio• Signal processing blocks:• m inputs × n outputs• Sources such as USRP, sinewave, saw wave, audio• Sinks such as USRP, audio,disk file, scopes• Filters, filter banks• Modulators• Flow graphs• Connect blocks together• Direct-manipulation GRChttp://www.gnuradio.org• Apps• Passive radar, Garage dooropeners,FM radio, GSM BTS
Page 1 and 2: Security in APCO P25NetworksSteve G
Page 3 and 4: Roadmap• P25 Overview• Introduc
Page 5 and 6: P25? Whuh?• Standardized public-s
Page 7 and 8: P25 Technology• Modes of operatio
Page 9 and 10: Roadmap• Overview• Introduction
Page 11 and 12: Sampling - Here’s our SourceSigna
Page 13 and 14: Sampling via Sound Card• Capturin
Page 15: Sampling via USRP• USRP1• 8 MHz
Page 19 and 20: Roadmap• Overview• Introduction
Page 21 and 22: OP25 Receiver
Page 23 and 24: Demodulation• P25 uses 3 differen
Page 25 and 26: P25 Voice Traffic
Page 27 and 28: WireShark + OP25
Page 29 and 30: Project Website• Project website
Page 31 and 32: Remote Inhibit - aka “Stun”•
Page 33 and 34: Radio AuthenticationUnit Registrati
Page 35 and 36: P25 Decryption• Keystream XORed w
Page 37 and 38: DES Cracking• DES/OFB not suited

Security in APCO P25 Networks - 2010

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