Data Mining - Concepts and Techniques.

A survey on trust management for Internet of Things

Two conditions must be satisfied in a secure quantum key agreement (QKA) protocol: (1) outside eavesdroppers cannot gain the generated key without introducing any error; (2) the generated key cannot be determined by any non-trivial subset of the participants. That is, a secure QKA protocol can not only prevent the outside attackers from stealing the key, but also resist the attack from inside participants, i.e. some dishonest participants determine the key alone by illegal means. How to resist participant attack is an aporia in the design of QKA protocols, especially the multi-party ones. In this paper we present the first secure multiparty QKA protocol against both outside and participant attacks. Further more, we have proved its security in detail.

Multiparty quantum key agreement with single particles

As an important branch of quantum cryptography, quantum private comparison (QPC) has recently received a lot of attention. In this paper we study the security of previous QPC protocols with a semi-honest third party (TP) from the viewpoint of secure multi-party computation and show that the assumption of a semi-honest TP is unreasonable. Without the unreasonable assumption of a semi-honest TP, one can easily find that the QPC protocol (Tseng et al. in Quantum Inf Process, 2011, doi: 10.1007/s11128-011-0251-0 ) has an obvious security flaw. Some suggestions about the design of QPC protocols are also given.

Comment on quantum private comparison protocols with a semi-honest third party

In many circumstances, a shared key is needed to realize secure communication. Based on quantum mechanics principles, quantum key agreement (QKA) is a good method to establish a shared key by every party's fair participation. In this paper, we propose a novel three-party QKA protocol, which is designed by using Greenberger---Horne---Zeilinger (GHZ) states. To realize the protocol, the distributor of the GHZ states needs only one quantum communication with the other two parties, respectively, and everyone performs single-particle measurements simply. Then, we extend the three-party QKA protocol to arbitrary multiparty situation. At last, we discuss the security and fairness of the multiparty protocol. It shows that the new scheme is secure and fair to every participant.

Novel multiparty quantum key agreement protocol with GHZ states

An efficient protocol for the quantum private comparison of equality with W state

We present a new quantum protocol for comparing the equal information with the help of a semi-honest third party (TP). Different from previous protocols, we utilize the four-particle χ-type states as the information carriers. Various kinds of outside attacks and participant attacks are discussed in detail. One party cannot learn the other’s private information. The TP cannot learn any information about the private information, even about the comparison result or the length of secret inputs.

A Protocol for the Quantum Private Comparison of Equality with χ-Type State

In this paper, a quantum private comparison protocol is proposed based on bell entangled states. In our protocol, two parties can compare the equality of their information with the help of a semi-honest third party. The correctness and security of our protocol are discussed. One party cannot learn the other's private information and the third party also cannot learn any information about the private information.

Quantum Private Comparison Protocol Based on Bell Entangled States

We present a new quantum private comparison protocol based on the four-particle χ-type states. Different from previous protocols using the four-particle χ-type states, our protocol have some advantages. Without using the entangled character, we only need to prepare one type of χ-type state and N
 χ-type states. And we use the Pauli local unitary operation on particles to encode the information and to extract information by measurement. We also discuss that our protocol can withstand all various kinds of outside attacks and participant attacks.

New Quantum Private Comparison Protocol Using χ-Type State

We present a new multi-party quantum private comparison protocol based on d-dimensional basis states. Different from previous protocols, our protocol have some advantages. n parties can determine wether their private information are equal or not in one time execution of our protocol. Without using the entangled character of d-dimensional basis states, we only need to perform the local unitary operation on particles to encode the information and to get the comparison result. We also discuss that our protocol can withstand various kinds of outside attacks and participant attacks.

Wen Liu

Papers

An efficient protocol for the quantum private comparison of equality with W state

A Protocol for the Quantum Private Comparison of Equality with χ-Type State

Quantum Private Comparison Protocol Based on Bell Entangled States

New Quantum Private Comparison Protocol Using χ-Type State

Multi-party Quantum Private Comparison Protocol Using d-Dimensional Basis States Without Entanglement Swapping