A method and device for quantum secure transmission

Abstract

The embodiment of the invention discloses a quantum secrecy transmission method and device, relates to the technical field of security, and is used for reducing effective decoding probability of interception information intercepted by eavesdroppers in the process of quantum secrecy transmission. The method comprises the steps that a sender and a receiver share a string of EPR entanglement pairs and state information of each EPR entanglement pair; each EPR entanglement pair is randomly in any one of two different types of Bell states or any one of at least three types of Bell states; a quantum state secrecy object is generated; the quantum state secrecy object comprises multiple secrecy bits; the secrecy bits are encrypted by utilizing first secret key particles so that the secrecy object after encryption is obtained; the secrecy object after encryption is sent to the receiver so that the secrecy object after encryption is decrypted and measured by the receiver by utilizing second secret key particles according to the Bell state of the EPR entanglement pairs so that a classic state decryption object is obtained; and the classic state decryption object comprises multiple decryption bits.

Description

technical field [0001] The invention relates to the field of security technology, in particular to a quantum secret transmission method and device. Background technique [0002] Cryptography techniques can be roughly divided into two categories: one is traditional mathematics-based cryptography, such as symmetric cryptography, asymmetric cryptography, etc.; the other is non-mathematical cryptography, such as quantum cryptography, DNA cryptography, etc. Quantum cryptography uses a single quantum state as the carrier of information, and different quantum states represent different information, which is then sent to the receiver using the communication network. Common expressions of quantum states are |0>, |1>, etc. Different quantum states represent different codes, for example, |0> can represent 0, and |1> can represent 1. [0003] Based on the quantum cryptography technology, a scheme for encrypting a session key is provided in the prior art. Specifically incl...

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Problems solved by technology

[0006] During the transmission of the above session key, it may be intercepted by an eavesdropper. Once the eavesdropper knows the Bell state of one of the EPR entangled pairs, he also knows the Bell states of all EPR entangled pairs, which makes it easier for the eavesdropper to Measure the session key intercepted by it, resulting in low security of the transmitted session key

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