The Study On The Technology Of File Creation Based On NTFS

With the wide application of computer technology, we should pay more attention to the information security and computer files. For computer enthusiasts and hackers, how quietly sneaked into someone else’s computer and get some valuable information, has become the focus of people’s attention, and the research of this technology has important practical significance for the agent or agents and other special populations.The target of this project is through the analysis of the basic storage structure of NTFS file directory on the disk on the study, does not depend on the Windows application programming interface (Application Program, Interface, API) called to it, file directory to create technology and file created in the implementation of the special conditions, improve the operation and management of files and directories of NTFS file system, the non Windows users can also does not depend on the Windows API operating system and NTFS files without the operating system environment.The mai contribution of this paper lies in:Firstly,for the 90H attribute of the index case more, when adding an index entry, the AOH attribute. The need to build a AOH property, free space and the need for a cluster to store all index entries, and modify the 90H attribute. It has not only solved the small directory directly to the file creation, but also solve the small directory change directory file to create.Secondly,to create the file in the directory, the main process is to use B+ tree traversal, find the index buffer, whether the index node index buffer by the judge found, respectively, will create a good index entry into the index buffer specified position, insert the index buffer area of the writing the disk, in directory to the file to create. The key problem is to file through the B+ tree traversal, find the insertion point is the index of the item. This enables the creation of documents in the level of the index or the directory of multi-level index.Finally,for the index buffer has index node, add the index entry will appear after the B+ tree. If the number of keywords in a leaf node is full, it must be split into two nodes are approximately the same number of keywords, and to ensure maximum key the two nodes in the upper node. The realization of the dynamic B+ tree nodes automatically delete, add and node splitting.In this paper, according to the structure of the NTFS directory, create the realization technology of B+ tree structure to split the case in the directory, directory and index in the buffer on the file system. For more safety to create files, provide theoretical knowledge and technology at the same time, it provides technical support for the follow-up study of NTFS better.