Privacy

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Do P2P Messaging apps that don't require the internet exist? (lemmings.world)

submitted 1 week ago by Ju135@lemmings.world to c/privacy@lemmy.ml

58 comments fedilink hide all child comments

We all know Signal, Matrix, Telegram, SimpleX, etc... But if you can't access the internet you can't communicate. Pretty logic. But would it be possible, at least theoretically, to create an app that permits to message people even if the internet goes down?

It might be a dumb question I really have no idea to be honest.

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[–] merde@sh.itjust.works 3 points 1 week ago* (last edited 1 week ago) (1 children)

wouldn't a cheap walkie-talkie be more practical in that situation?

i remember using this app some time ago ☞ https://f-droid.org/packages/org.jsl.wfwt/

[–] ThatGuyNamedZeus@feddit.org 5 points 1 week ago (1 children)

wouldn’t a cheap walkie-talkie be more practical in that situation?

That's not secure or encrypted

[–] IDKWhatUsernametoPutHereLolol@lemmy.dbzer0.com 5 points 1 week ago (1 children)

You can encrypt a radio.

Rattlegram is an app on iOS/Android that alllows converting text to audio and play it over your phone's speaker

Secure Space Encryptor (SSE) (known as Paranoia Text Encryption on iOS) is an Open Source app that can encrypt text.

Use SSE to encrypt text
Copy-Paste the Ciphertext to Rattlegram
Sent it over the radio
On the other end, use Raddlegram to turn the audio back to the ciphertext
Use SSE to decrypt.

Voila! Off-Grid Encrypted communications.

Warning: Encryption over radio is illegal in many countries 😉 (but fuck the law lol, who cares)

[–] ThatGuyNamedZeus@feddit.org 1 points 6 days ago (1 children)

You can encrypt a radio.

Yes, but that requires you and the one(s) you're communicating with to mod some radios and then to keep those radios secret, which won't be easy once you start using them, especially in a situation like that where the government would probably be scanning those frequencies for exactly that