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Journal of Physics B Atomic Molecular and Optical Physics

Economical quantum anonymous transmissions

Tian‐Yin Wang, Qiaoyan Wen, Fu-Chen Zhu

Published Nov 29, 2010• 23 citations
Publisher

Abstract

We present a new information-theoretically secure protocol for the anonymous transmission of quantum information. Different from the pioneering works, we use single photons to construct anonymous entanglement instead of multi-partite entangled states in this protocol, and therefore we reduce the complexity of physical implementation in practice.

DOI
10.1088/0953-4075/43/24/245501

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We present a new information-theoretically secure protocol for the anonymous transmission of quantum information. Different from the pioneering works, we use single photons to construct anonymous entanglement instead of multi-partite entangled states in this protocol, and therefore we reduce the complexity of physical implementation in practice.
We propose first protocol for anonymous distribution of quantum information that can be used to implement either channel with anonymous sender or channel with anonymous receiver. Our protocol achieves anonymity and message secrecy with unconditional security. It uses classical anonymous transfer. It tolerates disruption of the protocol, but the number of disrupters must be limited by the quantum Gilbert-Varshamov bound. This bound can be exceeded provided a specific entanglement distillation procedure will be used. A different version of the protocol tolerates any number of disrupters, but is secure only when receiver does not actively cooperate with other corrupted participants. Simplified version of this protocol was experimentally realized for 5 participants, but with different motivation, see [1].
An efficient information-theoretically secure protocol is proposed. It is built for the anonymous transmission of quantum information. In our proposed scheme, a photon of hybrid entangled pairs is travelling through the participants. After operations performed by the participants, anonymous entanglement transmission channels are generated between the sender and receiver by hybrid entanglement swapping. Our protocol achieves both sender anonymity and receiver anonymity against an active adversary and tolerates any number of corrupt participants. Furthermore, we demonstrate that our protocol has great capacity to teleportate quantum message with fewer resources.
We present the first quantum secure communication protocol for an anonymous receiver without the assistance of anonymous entanglement. In previous works, if a public sender wants to send quantum messages to a chosen receiver while protecting the identity of the receiver from others, all participants should cooperate first to construct the entanglement between the sender and the anonymous receiver. This is the most important process in anonymous quantum communications. With anonymous entanglement, the sender can communicate quantum messages to the anonymous receiver by applying teleportation protocols. In contrast, our protocol is novel and achieves communication of quantum messages directly from the public sender to the anonymous receiver based on the quantum one-time pad and current achievements. Notably, the anonymity of the receiver, as well as the privacy of the quantum messages, is perfectly protected with the exception of an exponentially small probability in our protocol.