encrypt(ORDER:<command numbers><commands array>, <key>)
encrypt(ISDONE:<command numbers>, <key>)
encrypt(STATUS:<command numbers><running/exit code/exception>, <key>)

A: write commands
B: generate command numbers
A: place order
B: give immediate status on recieved commands (to show the order has been accepted)
A: are these commands with the command numbers done?
B: give status on commands