| With the electric power enterprise business scope expands and the construction of the smart grid promotes, the demand for mobile terminal remote accessing is becoming more and more urgent.In this situation, how to achieve security communication and data exchange between mobile terminal and enterprise internal network depend on public network has become a key problem to be solved for various enterprises, especially electric power enterprises.The remote access typically involves three parts:access terminals, access channels and the internal applications. Poor protection in any of these three parts will bring security risks. The traditional mobile terminal remote access solution based on virtual private network focus on the establishment of a secure transmission channel, although they provide a guarantee to data transmission security to a certain extent, they lack protections of the whole access process, so they cannot meet the security demand of electric power enterprise.In this paper, after analyzing the present situation of electric power mobile terminal secure access, we design the electric power mobile terminal secure access system, aiming at meeting the special requirements of the electric power enterprise information protection. The system consists of three key aspects:secure access terminals, secure transmission channels and the protected application system, with which a three-tiered defense in depth for the mobile terminals is achieved. The system makes a targeted security reforms to mobile terminals of various types and a great quantity in electric power enterprise to enhance terminal security, designs a three-layered tunnels based on APN+SSL+RDP to provide a high-strength security data transmission channel, adopts access control technology to ensure the security of the internal application systems. The research of mobile terminal secure access system will promote the construction process of electric enterprise informatization and the smart grid. |
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