Wireless security communication method and system

Abstract

The invention discloses a wireless security communication method and system for ensuring the security of wireless communication in an intelligent transportation system, improving the data processing efficiency and reducing the complexity of security communication. The method comprises the following steps: at least one first secret key and identification information thereof are respectively stored in an OBU (On-Board Unit) and a CCS (Central Computer System) server; and the OBU is used for generating a second secret key on the basis of a random number and the first secret key after a digital certificate of the CCS server is passed through verification, encrypting information to be transmitted by adopting the second secret key, and then sending the identification information of the first secret key and the random number which generate the second secret key, and the information encrypted by the second secret key to the CCS server. The invention simultaneously discloses a wireless security communication system.

Description

technical field [0001] The invention relates to the technical field of intelligent transportation and wireless communication, in particular to a wireless safety communication method and system in an electronic congestion charging system. Background technique [0002] At present, the problem of traffic congestion is becoming increasingly prominent in large and medium-sized cities, and the problem of traffic congestion management has become an important research topic in intelligent transportation systems. [0003] In the charging system for controlling traffic congestion, in order to realize flexible charging, wireless communication is used between the on-board unit (OBU) and the central computer system (Central Computer System, CCS) server. The information includes important transaction records, therefore, it is very important and necessary to protect the secure communication between OBU and CCS server. [0004] In the prior art, the communication between the OBU and the CC...

AI Technical Summary

Problems solved by technology

[0005] Although SSL technology is very mature, many institutions (such as banking systems) have adopted the method of establishing SSL communication links to ensure the safe transmission of data, but in intelligent transportation systems, OBUs of millions of vehicles need to communicate with CCS The server communicates. If the SSL communication scheme is used, the interaction process between the OBU and the CCS server is too frequent and requires a large bandwidth. At the same time, each interaction process between the OBU and the CCS server requires a large amount of data calculation. The OBU hardware has high requirements, and it will put a lot of pressure on the operation of the CCS server, which will cause the OBU of some vehicles to fail to communicate because they cannot establish a communication link with the CCS server in time.

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