Same as trying to have Bitcoins created on planet Earth1 transferred to Bitcoins on planet Earth2:

Since they are 2 independent entities (2 groups), the Bitcoins from Earth1 is converted to US dollars then from US dollars is converted to Earth2 Bitcoins and stored in a wallet on Earth2. An intermediate conversion to US dollars is pointless therefore the only limiting factor is that Earth1 Bitcoins were not created on Earth2....but you would have the same level of security as when every single computer on Earth gets automatic windows software update every day from a THRUST worthy address such as Microsoft.com (instead of NorthKorea.com). Otherwise all of Earth's computers would presently be infected by viruses but they are not.

The only security breach that I see is when picking random 20,000 (or more) miners into 1 group is to make sure their addresses (IP addresses) are not fake and instead are all coming from one corrupt source such as North Korea....?