Communication security has to evolve to a higher plane in the face of the threat from the
massive computing power of the emerging quantum computers. Quantum secure direct …

As a new model for signing quantum messages, arbitrated quantum signature (AQS) has
recently received a lot of attention. In this paper we study the cryptanalysis of previous AQS …

Recently, a quantum private comparison (QPC) protocol with a dishonest third party
(TP)(Yang et al. in Quantum Inf Process, 2012. doi: 10.1007/s11128-012-0433-4) was …

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 …

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 …

In a recent article [Gao et al., Sci. China-Phys. Mech. Astron. 63, 120311 (2020)], a two-
receiver measurement-device-independent quantum secret sharing (MDI-QSS) protocol was …

Cryptanalysis is an important branch in the study of cryptography, including both the
classical cryptography and the quantum one. In this paper we analyze the security of two …

Based on four-qubit cluster states, we present a two-party quantum key agreement (QKA)
scheme using unitary operations. In this scheme, two participants perform the unitary …

As a feasible model for signing quantum messages, some cryptanalysis and improvement of
arbitrated quantum signature (AQS) have received a great deal of attentions in recent years …

This work proposes two quantum dialogue protocols, each of which is robust against one of
the following two kinds of collective noise: collective-dephasing noise and collective-rotation …