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disabled_larper wrote (edited )

Where I can find a clear article about our smartphones actually listening to us, I found contradictory claims on the subject

I’ve never heard of phones which automatically record and transmit audio on the general public. However phones can obviously be tapped, bugged, and hacked, which would pose a threat on an individual level if you’re concerned about that. Phones also use insecure communications, such as SMS, which would be a threat to anyone really.

And what can we do to stop our conversations being spied on ?

Depends on your threat model. It could be as simple as using an end-to-end encrypted messenger such as Signal with ephemeral messages enabled. Or it could be something as complex as throwing out any mobile phones you own and sending encrypted messages from an airgapped machine via external storage such as a USB or CD. Even then, there are ways to infiltrate and exfiltrate date on airgapped computers. If that’s a concern for you, I’d suggest doing your own research on it. TEMPEST might be a good place to start, but it would probably be very difficult to perfect with an untrained person trying to replicate it in a home environment.

Is it only facebook that spy on our conversations or also others apps ?

It’s just about everything. Even the very hardware and operating systems you use can’t be trusted. Windows, Mac, iOS, and Android all have their own issues with security, privacy, and freedom. GNU/Linux is a little better for freedom and privacy, but their security is even worse than that of the previous operating systems I mentioned. And that’s not even talking about the hardware and firmware.

In the meantime support projects which have a focus on security and freedom. seL4, Genode, RISC-V, Power9, etc all seem like promising foundations. For now just pick whichever is best for your situation. For some people it’s Mac & iOS, for others it’s GrapheneOS & Qubes, etc.