The causal structure of Minkowski space time: possibilities and impossibilities of secure positioning

摘要: Secure positioning, a prover located at specified position convinces set of verifiers distant reference stations that he/she is indeed the specific position, considered to be impossible if and have no pre-shared data while dishonest provers an arbitrary amount entanglement [Nature 479, 307-308 (2011)]. We argue here current impossibility results for secure positioning are upshot not utilizing full powers relativistic quantum information theory show hence position-based cryptography possible causal structure Minkowski space time non-locality used properly.