What is Quantum Position Verification
Channel: Máté Galambos
Date: 29/07/2021

Have you ever talked to someone on the phone, and wondered whether they are where they say they are? Quantum position verification could potentially answer that question. In this video I introduce the basics of position verification, including why it cannot be done classically, and why quantum communication might solve the problem.


References:
[1] N. Chandran, V. Goyal, R. Moriarty and R. Ostrovsky, "Position Based Cryptography," in Advances in Cryptology - CRYPTO 2009, Santa Barbara, USA, 2009.
https://books.google.hu/books?id=7Bi6BQAAQBAJ&lpg=PP1&hl=hu&pg=PP10#v=onepage&q&f=false
[2] W. K. Wootters and W. H. Zurek, "A single quantum cannot be cloned," Nature, vol. 299, no. 5886, pp. 802-803, 1982.
https://www.nature.com/articles/299802a0
[3] Kent, W. J. Munro and T. P. Spiller, "Quantum tagging: Authenticating location via quantum information and relativistic signaling constraints," Phys. Rev. A, vol. 84, no. 1, p. 012326, 2011.
https://arxiv.org/pdf/1008.2147.pdf
[4] H. Buhrman, N. Chandran, S. Fehr, R. Gelles, V. Goyal, R. Ostrovsky and C. Schaffner, "Position-Based Quantum Cryptography: Impossibility and Constructions," SIAM J. Comput., vol. 43, no. 1, pp. 150–178, 2013.
https://link.springer.com/content/pdf/10.1007/978-3-642-22792-9_24.pdf