Controlled quantum safe and direct communication method and system for preventing tampering

Abstract

The invention belongs to the technical field of safety communication, and discloses a controlled quantum safe and direct communication method and system for preventing tampering. A receiving end is controlled to obtain secret information of a sending end, and the sending end sends SC* to a control end; the control end disorganizes photons in SC*; then the control end sends rearranged SC* to the receiving end; if the control end does not tell the accurate sequence of the photons to the receiving end, the receiving end cannot resume SC and decrypt the secret information; the control end cannot know the secret information encrypted through K(k1, k2, ..., kN). The premise that a controller is honest is not needed; even under the condition that the controller is dishonest, the proposed protocolis still safe, and any tampering of the secret information can be easily found. By means of the controlled quantum safe direct communication method and system for preventing tampering, attack of fakephotons based on quantum teleportation can be resisted, and meanwhile, identities of two participants, namely, the sender and the receiver, can also be verified.

Description

technical field [0001] The invention belongs to the technical field of safe communication, and in particular relates to a tamper-proof controlled quantum safe direct communication method and system. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] Generally, it is hoped that the secret information is safely transmitted to the receiver, and the receiver can read the secret information correctly. However, in some special occasions or tasks, besides the sender and receiver, there is at least one controller. Only when all controllers agree, the recipient can correctly read the secret information sent by the sender. A quantum solution to the above task is a typical application called: controlled quantum-safe direct communication. Therefore, the security analysis of controlled quantum secure direct communication mainly falls on the answers to the following three questions: (1) Can external eavesdroppers ...

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Problems solved by technology

[0007] In the security analysis of the existing controlled quantum secure direct communication protocol, two aspects of security are considered: the receiver cannot recover the secret information without the permission of the controller and the external eavesdropper cannot obtain the secret information. They conduct research on the premise that the controller is honest and credible, but

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