this post was submitted on 17 Jun 2025
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Privacy
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Use Walkie talkies with a voice changer and coded phrases
No Imeis, no way to track you. Just don't transmit near your house.
Very insecure. Vulnerable to MITM, jamming, etc.
Airgapped Android phones (with radios removed) and use Rattlegram + OpenKeychain to encrypt and sign messages.
As for jamming... well they can just turn off mobile networks and the internet too.
What you mentioned doesn't have PFS nor break-in recovery, plus it uses PGP... a significant security downgrade compared to Signal or SimpleX.
That's the dilemma with modern commucations. If you use signal or similar apps, your device can get hacked with pegasus or similar malware. AFIAK, walkie talkies and ham radios don't really have "backdoors" (unless they messed with the supply chain), you hold the button and it transmits, let go and it doesn't transmit. Dead simple. If you do encryption using a separate non-internet-connected device, then transmit it over the old-school radio, its virtually unhackable.
So you really have to weigh the risks.
Are you trying to have Perfect Forward Secrecy and is Pegasus not a risk to you?
Or do you prefer to be secured against pegasus, but use a clunky non PFS encryption?
Are you doing all your communications before the protest? (in which case you can use a phone with signal)
Or do you also want to have comms during the protest? (in which case, radios have no IMEI and cannot really be "hacked" and encryption is done on a separate device)