Abstract
In this paper, we investigate a feasible scheme for continuous-variable (3,3)-threshold quantum secret sharing (QSS) protocol, which owns unconditional security against arbitrary attacks by an eavesdropper and/or dishonest participants. Our scheme is based on a one-sided device-independent approach. It treats a dealer as a trusted party while treating all participants as untrusted. We demonstrate that the (3,3)-threshold QSS protocol with unconditional security against eavesdropping and/or dishonest participants can be fulfilled by an analog of van Loock-Braunstein (vLB) entangled states, which uses only two single-mode squeezed vacuum states and linear optics. Such a vLB-like entangled state may find its potential applications in multipartite QSS with unconditional security.
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