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arXiv:quant-ph/0510144

Quantum Authentication and Quantum Key Distribution Protocol

Hwayean Lee, Jongin Lim, Hyung-Jin Yang

Published Oct 18, 2005• 3 citations
arXivHTMLPDF

Abstract

We propose a quantum key distribution protocol with quantum based user authentication. Our protocol is the first one in which users can authenticate each other without previously shared secret and then securely distribute a key where the key may not be exposed to even a trusted third party. The security of our protocol is guaranteed by the properties of the entanglement.

DOI
10.48550/arxiv.quant-ph/0510144

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•Jan 1, 2010•4 citations
We propose a quantum key distribution protocol with quantum based user authentication. Our protocol is the first one in which users can authenticate each other without previously shared secret and then securely distribute a key where the key may not be exposed to even a trusted third party. The security of our protocol is guaranteed by the properties of the entanglement.
The security of the previous quantum key distribution (QKD) protocols, which is guaranteed by the nature of physics law, is based on the legitimate users. However, impersonation of the legitimate communicators by eavesdroppers, in practice, will be inevitable. In fact, the previous QKD protocols is unsecure without authentication in practical communication. In this paper, we proposed an improved QKD protocol that can simultaneously distribute the quantum secret key and verify the communicators' identity. This presented authentication scheme is provably secure.
In this paper, a novel three-party quantum authenticated key distribution with a partially trusted third party protocol is proposed. Unlike most classical cryptography, the security of the protocol does not rely on the amount of computations required to find the encryption key, but on physical properties of the transmission medium (i.e., quantum mechanical properties). The session key shared between participants is concealed from the trusted third party while the participants trust the third party regarding the authentication part. Thus, the proposed system will be preferable for network systems in/between institutions, which deal with highly sensitive information (e.g., military bases, research facilities, hospitals).
Based on the entanglement feature of Greenberger-Horne-Zeilinger states, a multi-user quantum key distribution with mutual authentication is proposed. In the protocol, a semi-trusted third party, who may misbehave on its own but will conspire with none of the participants, is introduced to help arbitrary two users on a quantum network to achieve this secure task. Firstly, the third party prepares a three-particle entangled state. Then, he keeps one particle in his hand, and sends two particles to these two users respectively. Meanwhile, a keyed one-way hash function is utilized to generate an authentication message, in terms of which three parties respectively make an appropriate single-particle measurement on the particles in their hands. According to the measurement results, the third party can verify the identity of one user. It implies that one user is able to authenticate the other user with the assistance of the third party. After that, two participants use the remainder measurement results to generate a common session key. Moreover, the practical implementation of the presented protocol is discussed, which illustrates that this protocol is feasible under the current techniques. In the end, the security of the presented protocol is analyzed. It is shown that this protocol is secure in theory by proving that the presented protocol can stand against several common attacks.
We propose secure protocols for user authenticated quantum key distribution. We argue that the use of a trusted authority becomes inevitable in a realistic environment as that of multi-user key distribution. Here, we specifically look at one protocol that use nonorthogonal bases with two-qubit entanglement. As the trusted authority being the only one knowing the correlations of this entanglement he/she can protect an unauthorized user from getting the right key. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
We propose a Quantum Authentication and Key distribution protocol based on one-time n using one-way Hash function. The designated users can authenticate each other and the arbitrator using their one-time ID and distribute a quantum secret key using remained GHZ states after authentication procedure. Though the help of the arbitrator is needed in the process of authentication and key distribution, our protocol prevents the arbitrator from finding out the shared secret key even if the arbitrator becomes an active attacker. Unconditional security can be proved in our protocol as the other QKD protocols.
In the existing study of third party authentication, for message transformation has less security against attacks such as man-in-the-middle, efficiency and so on. In this approach, we at hand give a Quantum Key Distribution Protocol (QKDP) to safeguard the security in larger networks, which uses the combination of merits of classical cryptography and quantum cryptography. Two three-party QKDPs, one implemented with implicit user authentication and the other with explicit mutual authentication, which include the following: 1. Security against such attacks as the man-in-themiddle, eavesdropping and replay. 2. Efficiency is improved as the proposed protocols contain the fewest number of communication rounds among the existing QKDPs. 3. Two parties can share and use a long-term secret (repeatedly). To prove the security of the proposed schemes, this work also presents a new primitive called the Unbiased-Chosen Basis (UCB) assumption.