The Research On Warship Network Security Control Technique During Transfer Of Ocean Environment Information

In the currently international situation,the military network communication is the foundation of the information development of military system and also the key to ensure the victory of sea war.So it is very important to protect the secure transfer of information for the ocean environment information whit high secret in the information system used by warship.At present frequently used several kind of networks transport secure protocols has SSL and SSH and so on. SSL can provide the data transport service of high security, but because needs to establish own's certificate server reason and so on, this kind of protocol is not suitable for secure transfer of the ocean environment information in the military network.SSH is a protocol for secure remote login and other secure network services over an insecure network. It provided support of secure remote login, the secure file transfer, the access control and the port forwarding. The article presents a method based on SSH to implement the secure application of TCP/IP.Cryptology is the science how to study the theory of secret communication and the method of decoding.This article research the symmetrical key system ,the asymmetrical key system, the data integrity and the digital signature, and makes the improvement according to the above technology to the digital signature, after the improvement, the digital signature suits secure transfer of the ocean environment information, can take a kind method of secure transfer. This article also introduced SSH work principle in the Windows2000 platform, produced OpenSSH+ from to compile the software the information transfer solution and the realization process. Divides into the different rank to the ocean environment information on warship, and unifies the SSH secure protocol, and uses separately four methods of the plaintext transfer, the DES encryption, the mix encrypts and improves the digital signature to transmit the infonnation, forms has conforms to secure information transfer system of the ocean environment information function.The system is used to protect the secure transfer of ocean environment...