Security Authentication Method For Beidou ? Navigation Message

Beidou II civil navigation message is transmitted in an open channel,lacking security authentication.The navigation message faces the threat of information being forged and tampered,and is vulnerable to spoofing attacks.According to the information category and specific characteristics of Beidou civil navigation message,this paper proposes a civil navigation message security authentication method suitable for Beidou satellite navigation system.Based on the analysis of Beidou civil navigation message authentication requirements,the composition structure of Beidou civil D1 and D2 navigation message is analyzed,and a heterogeneous information authentication scheme suitable for Beidou civil navigation message is studied.The contents of the scheme include: First,aiming at D1 navigation message,an information authentication protocol based on certificateless cipher system is proposed to ensure the integrity and authentication of the information without reducing the availability of the information and without managing certificates;Secondly,aiming at D2 navigation message,an information authentication protocol based on identity cipher system is proposed,which provides information source authentication and information integrity confirmation functions and realizes information tamper prevention and anti-counterfeiting.The scheme proposed in this paper can effectively reduce the processing links such as digital certificate distribution and renewal in the traditional signature authentication scheme,improve the overall efficiency and authentication efficiency of the authentication protocol,have better authentication timeliness,lower calculation cost and communication cost,and solve the problems of the lack of authentication mechanism and potential safety hazards in Beidou II navigation message.