Breaking the Bounded Entanglement Barrier for Quantum Position Verification

Position verification, introduced by Chandran et al. SIAM J. Computing 2014, allows verifiers to test a prover's claimed position by an interactive protocol. Classical position verification is impossible. Even for Quantum Position Verification QPV, there always exists an LOCC Local Operations and...

Quantum Secure Key Exchange with Position-Based Credentials

Quantum key distribution QKD provides an information-theoretic way of securely exchanging secret keys, and typically relies on pre-shared keys or public keys for message authentication. To lift the requirement of pre-shared or public keys, Buhrman et. al. SIAM J. Comput. 43, 150 2014 proposed...