Two protons exchange glances on a train. Thereafter they never stop thinking about each other.

That’s quantum entanglement. Or something like it.

Apparently, quantum entanglement can also give us unbreakable encryption.

“In 1964 [John Stewart] Bell proposed a test to settle once and for all whether quantum mechanics really is as weird as it famously appears to be, in that it allows for instantaneous communication between two particles, no matter how far apart they are, on condition that they were once entangled together in the same place. The short answer, as experiments carried out over subsequent decades have shown, is yes, it is.”

Read all about it here before the NSA introduces flaws into the article. Bring paper and a pencil if you’re anything like me- I had to draw it out a few times to understand it.