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    • 10. 发明申请
    • Quantum Cryptographic Communication Method
    • 量子密码通信方法
    • US20090003591A1
    • 2009-01-01
    • US12224625
    • 2007-02-15
    • Yumiko MurakamiMasaki NakanishiShigeru Yamashita
    • Yumiko MurakamiMasaki NakanishiShigeru Yamashita
    • H04L9/00H04L9/28
    • H04L9/0852
    • A sender (1) adds decoy photons to a secret photon having confidential information, then, subjects each photon to a different rotational manipulation, and passes the photons along a quantum channel (3) (S11 and S12). A receiver (2) receives those photons and then obtains information about the position of the decoy photons from the sender (1) through a classical channel (4). Using the information, the receiver (2) subjects each of the decoy and secret photons to a different rotational manipulation and transmits the photons in a rearranged order (S13 and S14). The receiver (1) obtains information about the position and manipulation quantities of the decoy photons from the receiver (2) and decodes the decoy photons. If the quantum state of the decoys is identical to their initial quantum state, the sender (1) determines that no eavesdropper (5) should be present (S15 and S16), cancels only the encryption of the secret photon performed by himself or herself in S12, and transmits the secret photon (S17). The receiver (2) cancels the encryption of the secret photon performed by himself or herself in S13 and thereby obtains the confidential information (S18). The present method can securely send quantum information as well as classical information such as key information, and also effectively detect eavesdropping.
    • 发送者(1)将诱饵光子添加到具有机密信息的秘密光子,然后使每个光子受到不同的旋转操纵,并沿着量子通道(3)传递光子(S11和S12)。 接收器(2)接收那些光子,然后通过经典通道(4)获得关于来自发送器(1)的诱饵光子的位置的信息。 使用该信息,接收机(2)使诱饵和秘密光子中的每一个进行不同的旋转操作,并以重新排列的顺序发送光子(S13和S14)。 接收器(1)从接收器(2)获取关于诱饵光子的位置和操纵量的信息,并解码诱饵光子。 如果诱饵的量子状态与其初始量子态相同,则发送者(1)确定不应存在窃听者(5)(S15和S16),仅取消本人自己执行的秘密光子的加密 S12,并发送秘密光子(S17)。 接收机(2)在S13中抵消由自己执行的秘密光子的加密,从而获得机密信息(S18)。 本方法可以安全地发送量子信息以及诸如密钥信息的经典信息,并且还有效地检测窃听。