[Trisquel-users] Re : Is there a perfect method to guard our communication?

[lcerf]

Assuming you want commercial grade tactical security: A typical PC with no  
proprietary software on it, and exchanging PGP encrypted emails over internet  
(and ensuring that the other side also takes the same precautions) should  
suffice.

It suffices Edward Snowden, who successfully communicated with Laura Poitras  
and Glenn Greenwald that way.  For months before meeting them in Hong Kong.   
Without raising a flag at the NSA or any of its partners.  Yet, your  
"commercial grade tactical security" is only level 2/5 on your scale, which  
therefore does not look very reasonable.