APCO P25 Security Revisited - The Practical Attacks! - Matt Robert

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Ruxcon 2011 - www.ruxcon.org.au
APCO P25 is one of the worlds most commonly used digital radio protocols for Public Safety applications, including Australia, USA and Canada. After last years talk on the attacks we discovered in the APCO 25 protocol, we decided it was time to show how we went about implementing some of them. Using GNUradio Software Defined Radio, and the USRP hardware, we have implemented some attacks including the following.
We will cover topics such as key recovery using GPUs and FPGAs, Inhibit attacks using GNUradio and USRP as a P25 transmitter, and investigate the physical security (or total lack of) in a P25 key fill device.

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29 сен 2024

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Комментарии : 15

@rfi-cryptolab4251 8 лет назад

Coming soon.... Encrypted P25 control channels.

@DiverCTH 7 лет назад

Not likely to happen before P25 is retired. Too much infrastructure would have to be chucked.

@rfi-cryptolab4251 6 лет назад

DiverCTH Hytera implemented 128-bit OTA signalling encryption for DMR radios and all it took was a firmware and CPS update. One day something like this will become common on APCO P25 systems to thwart whackers. I don't run p25, but recently implemented OTA signalling encryption to our DMR systems which already had AES 256 voice encryption. Works great. Tested it against DSD, DSD+, and other radios- results are the same- no TG #, no RID # displayed. This kind of security is needed when you're dealing with exceptionally talented whack-hackers like the guys who did this research. Anything less gives them a way in.

@kevinwells2182 6 лет назад

p25 is national security risk p25 systems can be jammed with a 30 girls toy pager modified sold by Texas instruments with a cc11110 chip. digital radios can be jammed easy they put it a weak signal all you need to do is disrupt data and radios jam. digital radios put out weak signal as opposed to analog. only way to fix go back on analog radios

@Redneck_Ed 2 года назад

Encrypted CC never Made it out of the "gates" (someone reading this in the future some day will get that joke). Radio authentication on P25 and AES256 have been in use for many years now as of 2022. I'd love to see some updated research similar to what is presented here to see how much has been fixed already with that and other practices like strapping.

@adrianoleme Год назад

@@Redneck_Ed YES😁

@JimTheScot989 11 лет назад

P-25 is NOT the most common used digital radio specially for Public Safety. By far FAR Tetra is the most common digital radio:125 countries around the World, 11,000 + radio systems ....

@hexmen12 8 лет назад

hello !! I need your help . How do build the system comunication of p25 in GNU RADIO ? someone can show me the steps or some example

@ashnm001 9 лет назад

Great presentation! Well done.

@Steve211Ucdhihifvshi 6 лет назад

Apco is shit, it doesnt take a genius to block or disable a local area apco, just key into their freq. transmit noise and bam digital shits itself within range of your transmitter.