Encryption communication method and system based on magnetic field and visible light

Abstract

The invention discloses an encryption communication method and an encryption communication system based on a magnetic field and visible light. The method comprises the steps of enabling a transmitting end to be close to a receiving end, automatically identifying and starting a power source to communicate the transmitting end with the receiving end; collecting magnetic field information by the transmitting end and the receiving end; taking magnetic field information as secret key encryption primary data by the transmitting end and transmitting the magnetic field information by the visible light; after the receiving end receives visible light data, taking the magnetic field information as a secret key for decryption to obtain primary data, and executing the corresponding control action. According to the method, the terrestrial magnetism environmental data which are obtained in real time are used as the secret key, the communication of the visible light is encrypted, electromagnetic interference is avoided in the visible light signal transmission, no penetrability exists, and the safety is high; the transmitting end and the receiving end are both provided with proximity sensors, whether the transmitting end and the receiving end are close to each other is detected, and a communication mode or a power saving mode is automatically selected.

Description

technical field [0001] The invention belongs to visible light communication technology, in particular to an encrypted communication method and system based on magnetic field and visible light. Background technique [0002] Traditional access control and car door lock systems mainly use radio frequency technology, which has good penetration. However, this feature makes radio frequency signals easy to be intercepted and copied by electromagnetic interference, resulting in leakage of unlocking information and property loss. . Visible light is free from electromagnetic interference and non-penetrating, so it has high safety. [0003] Visible light can only be transmitted in one direction on many existing devices, such as the LED light of a mobile phone, and can only realize one-way communication; moreover, most mobile phones are equipped with geomagnetic sensors, and using magnetic field information as an encryption key can realize one-way transmission conveniently and efficien...

AI Technical Summary

Problems solved by technology

[0007] At present, the transmitter and receiver use the geomagnetic environment data as the key, and the communication method realized by encrypted visible light signals has not been disclosed in relevant documents.

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