Conference key agreement (CKA), or multipartite key distribution, is a cryptographic task
where more than two parties wish to establish a common secret key. A composition of …

Quantum conference key agreement (QCKA) allows multiple users to establish a secure key
from a shared multi-partite entangled state. In a quantum network, this protocol can be …

Genuine multipartite entanglement (GME) is considered a powerful form of entanglement
since it corresponds to those states that are not biseparable, ie a mixture of partially …

The concept of entanglement and separability of quantum states is relevant for several fields
in physics. Still, there is a lack of effective operational methods to characterise these …

Quantum cryptographic conferencing (QCC) allows sharing secret keys among multiple
distant users and plays a crucial role in quantum networks. Because of the fragility and low …

Multiparty quantum cryptography based on distributed entanglement will find its natural
application in the upcoming quantum networks. The security of many multipartite device …

Abstract Device-independent (DI) protocols, such as DI conference key agreement (DICKA)
and DI randomness expansion (DIRE), certify private randomness by observing nonlocal …

A multiparticle entangled state is an indispensable resource in quantum information
processing. However, the inherent noise in quantum channels may degrade the maximally …

One of the great promises of quantum technology is the development of quantum networks,
which will allow global distribution of entanglement for tasks such as distributed quantum …

Distributing quantum correlations to each node of a network is a key aspect of quantum
networking. Here, we present a robust, physically motivated protocol by which global …