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A comment on The phones of Ukrainian president Zelensky. Parent comment

Re:The phones of Ukrainian president Zelensky by rasz on Tuesday March 29, 2022 @05:41PM (#30848752)
This was true probably up to Iraq war. Good example http://www.milspec.ca/radspec/prc-343.html https://www.cryptomuseum.com/radio/selex/prr/index.htm Ordinary DECT home cordless phones could be considered as secure at the time :)

Nowadays we have enough compute power in a laptop with connected SDR to render this moot security by obscurity.

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Re:The phones of Ukrainian president Zelensky by bob1029 on Tuesday March 29, 2022 @06:04PM (#30848972)
> Nowadays we have enough compute power in a laptop with connected SDR to render this moot security by obscurity.

Can you provide some sort of example of how a laptop+SDR was used to discriminate something equivalent to a military-grade DSSS signal (i.e. one in which the pseudo noise function and its parameters are classified)?

If you know the PN function, I agree that it is trivial to detect/recover the transmission.

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Re:The phones of Ukrainian president Zelensky by rasz on Tuesday March 29, 2022 @07:09PM (#30849511)
USRP came out in 2005. Nowadays wide coherent multi radio SDRs are readily available in portable form factor. Beginner setup (sadly limited to <1.8GHz) started shipping recently https://www.crowdsupply.com/krakenrf/krakensdr

https://www.youtube.com/watch?v=z9RkPt6uVQ4 now add ability to do phase correlation

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