However, such a key needs to be stored in a protected place or transported through a shared communication line which, in fact, poses another threat to security.
"Communication lines are really good.
Nations are urged, proponents of this viewpoint say, to obtain bases, strategic materials, buffer states, "natural" frontiers, control of communication lines for reasons of security, or to prevent other states from obtaining them.
The communication lines appear to be down, and the security presence is high.
Although the two countries view each other as rivals in security matters, U.S. military officials say it is vital that communication lines remain open to avoid hostile encounters that could mushroom into something worse.
First, avoid discussing any commercially sensitive or private information on open communication lines, said Rob Walker, head of information and analysis at International SOS, international health, safety and security consultants based in the UK.
All communication lines have been cut in the town and all roads leading to it were blocked, residents in nearby towns said, and security forces are not letting anyone leave or enter the town.
Our communication lines are open".
He wants to keep all communication lines open".
But the company kept communication lines open.
3. Keep the communication lines open.
