A method for compressing and encrypting ospf protocol messages based on lzw compression algorithm
A technology of protocol message and compression algorithm, which is applied in the direction of transmission system, electrical components, etc., can solve the problems of non-secrecy, high repetition of OSPF protocol message content, and large network bandwidth consumption, so as to improve confidentiality and prevent network topology Information or the implementation of protocol attacks, the effect of fast processing speed
Active Publication Date: 2019-08-16
CHONGQING JINMEI COMM
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When the network scale is large or the number of routing tables is large, a large number of OSPF protocol packets will be generated inside the network, resulting in excessive consumption of network bandwidth.
The research found that the contents of standard OSPF protocol packets are highly repetitive, especially the Update and Query packets.
In addition, OSPF protocol messages are generally transmitted in plain text. Even if MD5 authentication is used, it can only ensure the reliability of information exchange and cannot keep it confidential. As long as an intruder can receive OSPF packets, he can obtain network topology information based on the routing information exchanged between routers.
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[0023] Such as figure 1 and figure 2 Shown is the method for compressing and encrypting OSPF protocol packets based on the LZW compression algorithm. It should be noted that, in order to describe the implementation of the present invention more clearly and briefly, original functional modules of the device are omitted in the figure, and only functional modules related to the present invention are shown.
[0024] 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 with reference to the accompanying drawings. It mainly includes the following steps:
[0025] 1) The OSPF protocol processing unit sends the content to be sent to the OSPF data sending unit for processing, and generates a standard OSPF protocol message containing the IP header;
[0026] 2) The OSPF data sending unit sends the standard OSPF protocol message to the OSPF message processing unit for processing;...
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The invention discloses a method for compressing and encrypting an OSPF protocol message based on an LZW algorithm. Occupation of a narrowband channel of a dedicated network by the protocol message is reduced through compressing and reducing the length of the OSPF protocol message. Encryption is realized through exchange of sub-block positions of a compressed content according to a data block exchange rule. The method has beneficial technical effects of reducing length of the OSPF protocol message according to a lossless compression method, reducing occupation of the narrowband channel of the dedicated network by the protocol message, and saving a transmission resource. Encryption is realized through exchange of sub-block positions of the compressed content according to the data block exchange rule, thereby improving security of the protocol message, and effectively preventing acquisition of network topology information or protocol attack by a hacker through sniffing and analyzing the protocol message. The method provided by the invention has advantages of high convenience in use, high processing speed, easy technology realization, etc. On the condition that an existing network state and the OSPF protocol are unchanged, protocol convergence speed can be effectively improved.
Description
technical field [0001] The invention relates to the field of routing protocols, in particular to the OSPF routing protocol applicability technology of a dedicated network with narrow bandwidth channels. Background technique [0002] The transmission links currently used by the private network are mainly narrow-bandwidth channels such as microwave links, satellite links, and ultrashort wave links. The OSPF protocol is used for networking between network switching and routing devices. When the network scale is large or the number of routing tables is large, a large number of OSPF protocol packets are generated inside the network, resulting in excessive consumption of network bandwidth. The study found that the contents of standard OSPF protocol packets are highly repetitive, especially the Update and Query packets. In addition, OSPF protocol messages are generally transmitted in plain text. Even if MD5 authentication is used, it can only ensure the reliability of information...
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IPC IPC(8): H04L29/06
CPCH04L63/0428H04L69/04
Inventor 雷文虎康宗绪窦茂森孙长龙
Owner CHONGQING JINMEI COMM