Entangled photon pair generation There are many methods for generating photon pairs, but a non-linear process called Spontaneous Parametric Down-Conversion (SPDC) has become the gold standard and is the most mature.
Quantum Key Distribution only supports low-key rates, so only small data rates are possible using one-time pad encryption. Quantum Key Distribution can be combined with a classical algorithm, such as an Advanced Encryption Standard (AES) to solve this limitation. European Space...
In space-based relay quantum communication, the satellite is the trusted actor in charge of distributing the keys and being quantum; it has a higher degree of security since it can be verified if they are secret. Therefore, for this system, it is necessary to have a trusted...
