With the advancement of smart grid construction, cloud computing, Internet of Things and other related new technologies will be widely used. These technologies bring benefits and convenience to users, but also bring new information security problems. Research and solution of these problems have become It is imperative. Only the cloud computing security issues in the smart grid will be discussed below.
1 Cloud computing and its possible application model in smart grid Cloud computing
(CloudCompuTIng) is an emerging business computing model that distributes computing tasks on a resource pool composed of a large number of computers, enabling various application systems to obtain computing power, storage space, and various software services as needed.
Cloud computing is the development of distributed computing, parallel computing, and grid computing, or the commercial realization of these computer science concepts. Narrowly defined cloud computing refers to the delivery and use model of IT infrastructure, which refers to on-demand and easy expansion through the network. To obtain the required resources (hardware, platform, software). The network that provides resources is called "cloud". The resources in "cloud" appear to users to be infinitely scalable and can be obtained at any time, as needed. Use, expand at any time, pay for use. This feature is often referred to as the use of IT infrastructure like hydropower. Broadly speaking, cloud computing refers to the delivery and use model of services. It refers to obtaining needs through the network in an on-demand and easily scalable manner. This service can be IT and software, Internet related, or any other service. The following is a brief statement of the two possible applications of cloud computing in the smart grid.
1.1 Smart grid data disaster recovery based on cloud computing
The power transmission system of the smart grid is used to transmit power information in both directions. Data will flow between the various parts of the smart grid. The massive grid data generated after the power equipment is intelligent needs to be analyzed and processed every day. Therefore, the typical application is Cloud computing-based data storage (cloud storage) is to store large-capacity data packets such as users' large-scale power grid information in the data center of the network.User-side equipment does not need to install large-capacity hard drives, which greatly reduces the cost of equipment and users It can be extracted after passing safety certification when needed. In order to ensure the high availability, high reliability and economy of data storage in the power industry using cloud computing platforms, cloud computing generally uses distributed storage to store data, while using redundant storage To ensure the reliability of the stored power data, that is, to store multiple copies of the same data. In addition, the cloud computing system needs to meet the needs of a large number of power users at the same time and provide services to these users in parallel. Therefore, cloud computing data storage The technology must have the characteristics of high throughput and high transmission rate.
The cloud computing platform of the smart grid in the future can use the enterprise private cloud method to build several regional large-scale computers and large-scale server cloud storage centers to provide infrastructure, platform and software-level cloud computing services to all levels of units. At the same time, through computing power Expansion and the gradual concentration of business applications, these centers support the intensive management of smart grid business. In order to protect the investment in the construction of data centers at all levels of power companies, through the extensive application of cloud computing technology, these centers are at similar levels The combination of power enterprise data centers, the construction of headquarters information system resource pools, the effective use of the storage computing power of data centers at all levels of power companies, and the realization of a multi-level cloud computing data center. Figure 1 shows cloud computing-based smart grid data disaster recovery System architecture.
The cloud computing-based smart grid data disaster recovery system architecture includes three layers:
The resource layer, the middle layer and the user layer are composed of three layers. The main functions of each layer are introduced below: 1) The resource layer, for cloud-based disaster recovery systems, the resource layer here mainly includes various storage resources and has various storage Server, tape library and various corresponding software, etc .; 2) The middle layer, which is the core of the cloud storage system, including data management, resource management, job management, information management, and security management modules. Data management is mainly cloud computing Management and control of data transmission between storage servers in the environment; resource management is mainly to discover, manage and control the storage resources available in the cloud storage system; job management is mainly to complete the various users in the cloud storage system Storage job management and scheduling; information management is mainly to obtain and monitor various storage resource information in the cloud storage system; security management is to use the cloud storage system to provide users with functions such as authentication, authorization, and issuance of various certificates 3) User layer, it provides users with a unified unified portal interface using cloud storage system.
Cloud computing-based smart grid data disaster recovery system architecture meets the characteristics of robustness, flexibility, scalability, simplicity, and security, and can ensure that power companies use the already constructed cloud storage platform for disaster recovery of massive data .
1.2 Cloud computing-based smart grid virus protection Cloud computing has powerful data calculation and synchronous scheduling capabilities, which can greatly improve the response speed of various security products to new threats, and at the same time distribute patches or security policies to various branch nodes. Therefore, the establishment of a cloud-based smart grid virus protection security platform can not only ensure the safety of the power enterprise's information network, but also save a lot of manpower and financial resources.
To achieve and guarantee the security of the power information network based on cloud computing, first, the corporate headquarters should establish a sufficiently large server cluster to migrate the large amount of computing work related to suspicious samples collected by various power enterprise clients to the server side, and and Many clients interact.
Cloud computing-based smart grid virus protection architectureIn the cloud-based smart grid virus protection architecture, it mainly includes a data collection center, a data analysis center, a virus publishing center, and a client.The workflow is as follows: First, the client runs cloud security Module, query the suspicious sample database in the virus distribution center for suspicious samples collected by the data collection center, if the suspicious sample database has its characteristics, then directly kill, otherwise carry out the following 432011 No. 06 technical research operation: Receive data The suspicious sample data provided by the collection center uses the most advanced technical killing technology to analyze the suspicious sample.At the same time, the final analysis result is inserted into the suspicious sample database and released by the virus distribution center to all clients.
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