#physic #quantum >What locality does exclude, however, is the possibility that the preparation of either measuring device can exert a causal influence on the other subsystem so as to affect the probabilities for the possible outcomes of measurements per formed on that other subsystem. Since these two events, the preparation of one measuring device in a given state and the measurement executed by the other measuring device, can be space-like related, locality is a requirement of [[Relativity|relativity]] theory. **Jarrett 1984** >Locality is unaffected by events in regions of the universe so removed from the given system that no signal could connect them. **Howard 1989** Two entangled photons being causally connected, no matter the spatial dimension, it would unlock the possibility to communicate “secretly” without any chance of being listened to unlike radio communication like GSM which is fully listened by NSA in US, DGSE in France...(having built the tools to do such listening myself). In a game theoretical scenario involving extraterrestrial life, it would be of great use, in order to avoid causing the [[Dark forest theory]] by exposing [[Information|information] to outside players.