论文标题
基于传送的量子密码学的渐近安全分析
Asymptotic security analysis of teleportation based quantum cryptography
论文作者
论文摘要
我们证明[Opt。社区。 283，184（2010）]，仅使用编码从爱丽丝到鲍勃的经典位编码的正交状态构建，这是渐近地保护所有类型的个人和集体攻击。然后，我们调查对该协议的修改，导致更高的秘密率和防御连贯攻击的安全性。换句话说，我们显示了无条件的安全量子键分配协议，该协议不需要非正交量子状态来编码从爱丽丝发送到鲍勃的秘密密钥的位。我们还通过探索基于纠缠的表示的施密特分解的非唯一性来重新审视BB84协议的安全证明。与标准安全分析相比，这使我们能够以稍高的量子位错误率（量子通信通道的噪声）进行安全传输。
We prove that the teleportation based quantum cryptography protocol presented in [Opt. Commun. 283, 184 (2010)], which is built using only orthogonal states encoding the classical bits that are teleported from Alice to Bob, is asymptotically secure against all types of individual and collective attacks. We then investigate modifications to that protocol leading to greater secret-key rates and to security against coherent attacks. In other words, we show an unconditional secure quantum key distribution protocol that does not need non-orthogonal quantum states to encode the bits of the secret key sent from Alice to Bob. We also revisit the security proof of the BB84 protocol by exploring the non-uniqueness of the Schmidt decomposition of its entanglement-based representation. This allows us to arrive at a secure transmission of the key for a slightly greater quantum bit error rate (quantum communication channel's noise) when compared to its standard security analysis.
