0

Assume that I don't have any Internet access in my country. The only thing that I have is a mobile phone with a 3G or 4G SIM card inside. The mobile operator didn't provide any Internet access also.

Now I want to send some data (Text/Voice) to my friend in another country. Is there any way? How I can do it?

And if I want the communication to be secure, what shall I do? I mean I don't want to anybody be able gain the data, except my friend. is there any way? If so, how?

closed as off-topic by Eric G, Jens Erat, schroeder, M'vy, RoraΖ Feb 23 '15 at 12:08

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question does not appear to be about Information security within the scope defined in the help center." – Jens Erat, schroeder, M'vy
If this question can be reworded to fit the rules in the help center, please edit the question.

2

Yes, you could encrypt your data.

This will be hard if you don't have a smartphone. You could manually encrypt your text messages using One-time pad (Cold War tactics basically). Manually encrypting voice messages is not possible, unless you invent some kind of secret language (which will never be a 100% secure).

If you do have android, have a look here: https://www.eff.org/secure-messaging-scorecard Some of these apps (Like Open WhisperSystems TextSecure) can use regular SMS.

Not the answer you're looking for? Browse other questions tagged or ask your own question.