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Message authentication method, equipment, system and medium

An authentication method and message technology, applied in the field of satellite navigation, can solve the problems of increasing the complexity and cost of the terminal

Inactive Publication Date: 2019-04-16
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

The existing GNSS spoofing protection methods mainly use array antennas to detect and identify spoofed navigation signals, and a large number of terminal devices need to be upgraded in the future, which greatly increases the complexity and cost of the terminal

Method used

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  • Message authentication method, equipment, system and medium
  • Message authentication method, equipment, system and medium
  • Message authentication method, equipment, system and medium

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0033]The present invention provides an electronic text authentication method, which includes: generating a key chain and navigation data at a first terminal, wherein the key chain includes a plurality of keys K 0 , K 1 ,…K N , and K 0 is the root key; the first terminal passes the key K m Perform message authentication code operation on the mth navigation data to generate MAC m , the MAC m , the mth navigation data and key K m-i Send to the second terminal, wherein, m is an integer greater than zero and less than or equal to N, i is an integer greater than zero and less than or equal to m; the second terminal MAC m and key K m-i Arranging and generating the mth authentication navigation data in the preset navigati...

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Abstract

The invention provides a message authentication method. The method includes a first terminal, a second terminal and a third terminal, and includes: using scalability of a civil navigation message format to write a key K<m-i>, which is of encrypting [m-i]-th navigation data, into a later-generated m-th authentication navigation signal by the second terminal, writing an encryption result into a m-iauthentication navigation signal, and sending the same to the third terminal; extracting the key K<m-i> in the received m-th authentication navigation signal by the third terminal, using the key K<m-i> to re-encrypt received [m-i]-th navigation data, and if an encryption result is the same as the encryption result in the m-i authentication navigation signal, determining that the [m-i]-th navigation data pass verification, and if the encryption results are not the same, determining that the [m-i]-th navigation data do not pass verification. An effect of completing verification on the navigationdata in a case of not increasing equipment complexity is realized. On another aspect, the invention also provides electronic equipment, a system and a computer-readable medium which execute or storethe above authentication method.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to an electronic document authentication method, device, system and medium. Background technique [0002] Beidou navigation satellites are widely used in many fields such as location positioning, weather forecasting, transportation, and emergency assistance. However, frequent navigation signal accidents in recent years have aroused people's concern about the safety and reliability of Beidou navigation satellite system (Global Navigation Satellite System, referred to as GNSS) services. concerns. The current GNSS broadcast signal design is completely open, and is extremely vulnerable to spoofing attacks, that is, by disguising as real Beidou navigation satellites, broadcasting spoofed navigation signals that are highly similar to real navigation signals, and then issuing spoofed information to specific targets. The existing GNSS spoofing protection methods mainly use arr...

Claims

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Application Information

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IPC IPC(8): H04L9/32
CPCH04L9/3242H04L9/3247
Inventor 刘婷陈潇赵博昊郭旭强赵越吴海涛
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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