[gonzo41]

In the army battle field tactical communication are handle by streaming ciphers on the radio. The idea is not to be impossible to breach. But strong enough that time is on your side, so that you can say "move those tanks over to feature 229", and that will be tactically perishable information. on the internet, i would treat all information the same. if they can't break it today, they will wait until they have the math or the raw power to break what you have encrypted. so only talk about what doesn't matter if someone finds out about it.

like, hey lets meet up here at time x. in two days that means nothing significant.

but anyway, first step is getting an old mobile without data.

[cnvogel]

    > like, hey lets meet up here at time x. in two days
    > that means nothing significant.

It might still be significant in the far future that you have met a particular person on May, 19th 2015!