In principle, quantum key distribution (QKD) offers information-theoretic security based on
the laws of physics. In practice, however, the imperfections of realistic devices might …

The science of quantum information has arisen over the last two decades centered on the
manipulation of individual quanta of information, known as quantum bits or qubits. Quantum …

All our former experience with application of quantum theory seems to say that what is
predicted by quantum formalism must occur in the laboratory. But the essence of quantum …

Quantum key distribution (QKD) is the first quantum information task to reach the level of
mature technology, already fit for commercialization. It aims at the creation of a secret key …

Quantum cryptography exploits principles of quantum physics for the secure processing of
information. A prominent example is secure communication, ie, the task of transmitting …

We present the optimal collective attack on a quantum key distribution protocol in the “device-
independent” security scenario, where no assumptions are made about the way the …

Quantum Information Theory is an area of physics which studies both fundamental and
applied issues in quantum mechanics from an information-theoretical viewpoint. The …

Since 1984, various optical quantum key distribution (QKD) protocols have been proposed
and examined. In all of them, the rate of secret key generation decays exponentially with …

Despite enormous theoretical and experimental progress in quantum cryptography, the
security of most current implementations of quantum key distribution is still not rigorously …

The impossibility of perfectly copying (or cloning) an unknown quantum state is one of the
basic rules governing the physics of quantum systems. The processes that perform the …