Two-party quantum key negotiation protocol based on three-particle GHZ state

A quantum key agreement, three-particle technology, applied in the field of two-party quantum key agreement protocol, can solve problems such as low qubit efficiency, inability to resist Trojan horse attacks and delayed photon Trojan horse attacks, and achieve unconditional secure and confidential communication, high quantum The effect of bit efficiency
CN105490804AActive Publication Date: 2016-04-13XIAN UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN UNIV OF POSTS & TELECOMM
Publication Date
2016-04-13

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Abstract

The present invention discloses a two-party quantum key negotiation protocol based on a three-particle GHZ state, comprising the following steps: step 1: Alice and Bob negotiate codes of quantum states; step 2: Alice prepares n+q GHZ states and divides all the particles into sequences; Alice sends a sequence SC to Bob; step 3: Bob selects and measures q sample particle(s); Alice selects measurement bases to measure corresponding particles; Bob calculates an error rate; and if the error rate is low, step 4 is performed, otherwise step 2 is performed; step 4: Alice performs a Bell measurement on two particles with the same sequence number in the sequences; Bob performs X-base measurement on the particles in the sequences; and Alice and Bob respectively obtain the same shared key according to measurement results and the codes of the quantum states. According to the present invention, the two-party quantum key negotiation protocol can resist existing participant attacks and external attacks as well as Trojan horse attacks, is safe in noiseless quantum channels and quantum noise channels, and can achieve a relatively high quantum bit efficiency.
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Description

technical field

[0001] The invention belongs to the field of quantum communication, and in particular relates to a quantum key agreement (Quantum key agreement) protocol, in particular to a two-party quantum key agreement agreement based on a three-particle GHZ state. Background technique

[0002] Quantum cryptography is a new technology for communication and network security, and its security is guaranteed by the basic principles of quantum mechanics. Unlike traditional cryptography, which is mostly computationally secure, quantum cryptography can achieve unconditional security, which has attracted a lot of attention. The quantum key agreement (QKA) protocol is a new important branch of quantum cryptography, which allows participants to negotiate a classical shared secret key through an open quantum channel, and the contribution of each participant is the same, any participant None or a subset of participants can independently determine the shared secret. Using the shared...

Claims

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