Quantum key distribution without sending a quantum signal

Quantum Key Distribution Without Sifting

We propose a novel quantum key distribution protocol that uses AES to expand an initial secret, allowing us to individually authenticate every qubit, with tags that are efficient to construct. In exchange for an increase in the amount of classical data to be transmitted, the tags can be handled such that they allow secure key generation from two photon states, and make BB84 exactly 100% efficie...

Long Distance Quantum Key Distribution without Quantum Memory

A quantum cryptography scheme for lossy channel is proposed which does not employ quantum memory. The scheme also does not use quantum codes and is rather simple for practical implementation. The goal of quantum cryptography is to secretly distribute the key (a string of bits) between the two spatially separated legitimate users. The existing quantum cryptography schemes can be classified into ...

Quantum key distribution without the wavefunction

A well-known feature of quantum mechanics is the secure exchange of secret bit strings which can then be used as keys to encrypt messages transmitted over any classical communication channel. It is demonstrated that this quantum key distribution allows a much more general and abstract access than commonly thought. The results include some generalizations for the Hilbert space version of quantum...

A quantum key distribution protocol without classical communications

We provide a quantum key distribution protocol based on the correlations of the Greenburger-Horne-Zeilinger(GHZ) state. No classical communication is needed in the process of the establishment of the key. Our protocol is useful when an unjammable classical communication channel is unavailable. We prove that the protocol is secure.

Quantum Key Distribution