中文摘要：

根据腔量子电动力学（QED,quantum electrodynamics）原子的演化规律提出腔QED内新颖的量子隐写协议,其隐藏容量高达4bit。协议通过腔QED中任意两个Bell态纠缠交换,建立一个隐藏信道传送秘密信息。协议不需将多粒子量子纠缠态作为量子资源,也不涉及关于多粒子量子纠缠态的纠缠交换和量子测量。分析表明,本文协议能够抵抗截获-重发攻击、测量-重发攻击和纠缠-测量攻击,具有良好的安全性。

英文摘要：

In this paper, a novel quantum steganography protocol via cavity quantum electrodynamics （QED） is proposed by using the evolution law of atom in cavity QED,whose hidden capacity is as high as four bits. The proposed protocol builds up a hidden channel to transmit secret messages through the entanglement swapping of any two Bell states in cavity QED. The proposed protocol not only needs no multiparticle quantum entangled state as the quantum resource, but also involves no entanglement swap- ping or quantum measurement about multiparticle quantum entangled state. Analysis shows that the proposed protocol is able to resist the intercept-resend attack,the measure-resend attack and the entangle- measure attack, so it has good security.