A method to resist the attack of the detection end of the quantum key distribution system
A quantum key distribution, single-photon detector technology, applied in key distribution, can solve problems such as system security loopholes
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specific Embodiment 1
[0035] A method for resisting the attack of the detection end of the quantum key distribution system, characterized in that: such as figure 2 As shown, the Bob end includes an optical path, a single photon detector and a first gate jumping module, the optical path is a decoding optical path, and the optical signal reaches the single photon detector after being decoded by the optical path, and the first gate jumping module is It is used to set the gate signal of the single photon detector; in each cycle T, the arrival time of the gate signal is randomly adjusted through the first jump gate module, and the arrival time of the optical signal remains unchanged, ensuring that the attacker Eve cannot know every time the detector opens the door time. There are two implementations in this hardware mode:
[0036] The first implementation method: the first jump door module is divided into two modes when it works, such as image 3 As shown, the two modes are respectively the transmiss...
specific Embodiment 2
[0043] A method for resisting the attack of the detection end of the quantum key distribution system, characterized in that: such as Figure 7 As shown, the Bob end includes an optical path, a single photon detector, a second optical jump gate module and a second electric jump gate module, the optical path is a decoding optical path, and the optical signal passes through the second optical jump gate after being decoded by the optical path After the module reaches the single photon detector, the second electric jump gate module is used to set the gate signal of the single photon detector, and the second optical jump gate module is used to select the delay time of multiple optical signals, The delay time of the optical signal changes randomly throughout the period T, and the time difference is at least greater than half of the time of the rising edge or falling edge of the gate signal;
[0044] Wherein, the second optical jumping door module is divided into two modes during oper...
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