量子广播通信
Quantum broadcast communication
摘要：
广播加密允许发送者通过广播信道将他/她的秘密安全地分发给动态变化的用户组。本文考虑了一个简单的量子广播通信任务，即中心节点通过量子信道向多个接收者广播自己的秘密。我们提出了三种量子广播通信方案。第一个方案利用纠缠交换和Greenberger-Horne-Zeilinger态实现了一个任务，即中心方将自己的秘密广播给一组接收方，这些接收方与他共享一个组密钥。在第二种方案中，基于密集编码，中心方将秘密广播给多个接收方，这些接收方与中心方共享各自的认证密钥。第三种方案是一种量子广播通信方案，该方案采用量子加密，中心方可以将秘密广播给合法接收者的任意子集。
英文摘要：
Broadcast encryption allows the sender to securely distribute his/her secret to a dynamically changing group of users over a broadcast channel. In this paper, we just consider a simple broadcast communication task in quantum scenario, which the central party broadcasts his secret to multi-receiver via quantum channel. We present three quantum broadcast communication schemes. The first scheme utilizes entanglement swapping and Greenberger-Horne-Zeilinger state to realize a task that the central party broadcasts his secret to a group of receivers who share a group key with him. In the second scheme, based on dense coding, the central party broadcasts the secret to multi-receiver who share each of their authentication key with him. The third scheme is a quantum broadcast communication scheme with quantum encryption, which the central party can broadcast the secret to any subset of the legal receivers.
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