Device-independence for two-party cryptography and position verification

Understand

Quantum communication has demonstrated its usefulness for quantum cryptography far beyond quantum key distribution.

• One domain is two-party cryptography, whose goal is to allow two parties who may not trust each other to solve joint tasks.
• Another interesting application is position-based cryptography whose goal is to use the geographical location of an entity as its only identifying credential.
• Unfortunately, security of these protocols is not possible against an all powerful adversary.