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中文摘要：
提出了一个利用一束单光子对话的方案。在方案中，利用两个不同的幺正操作对光子态进行编码，并且从一束光子中选择较大的子集进行窃听检查，该方案能够有效地抵御截取再发送袭击。此外，由于利用单光子没有利用EPR对，因此该方案是很实际的。该方案是绝对安全的。
英文摘要：
We propose a quantum dialogue scheme using a batch of single photons. In the scheme, we encode the states of the single photons with the secret message by two different unitary operations, and select randomly a suffi- ciently large subset of photons from the batch to check eavesdropping, so, our scheme can resist the intercept-and- resend attack efficiently. In addition, our scheme is practical because it uses usingle photons instead of EPR pairs. The conclusion shows that the scheme is unconditionally secure.
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