Method for encrypting/deciphering dynamically data file

Abstract

The invention discloses a method for dynamically encrypting and decrypting data document, which comprises that in network condition, via C/S mode, manager centralized controls important documents of user computer, the system dynamically decrypts and encrypts clear text, the important documents can only be read or changed under the control of server in special network condition, which content is shown as cryptogram when off the network condition, when user copies clear text document from other places, the documents can not be changed when the system is sensitive, or else, in storage, the documents are converted into cryptogram type. The invention is based on software platform, correlated only with operation system, but not application programs, to dynamically encrypt and decrypt the data documents, therefore, the data documents can only work in private network condition, while the leaked document is in cryptogram type, to protect intellectual property.

Description

Technical field: [0001] The invention relates to the technical field of local area network data file security, and relates to a method for dynamically encrypting and decrypting data files. Background technique: [0002] With the further development of computer and network technology, the contradiction between global information integration and national security has gradually become prominent. From government documents, enterprise engineering drawings, standard operating procedures to sales presentations, all kinds of documents are crucial to the smooth and effective operation of governments and companies. As a result, information security has become a core part of government and enterprise security today. When it comes to information security, people naturally think of virus damage and hacker attacks. In fact, it is not the case. The losses caused by the theft of information by the government and enterprises far exceed the losses caused by virus damage and hacker attacks. ...

AI Technical Summary

Problems solved by technology

Network security protection such as firewalls, intrusion detection, and isolation devices play an irreplaceable role in preventing external intrusions, but they are helpless for internal leaks. Hackers who really steal or destroy information may be hiding inside, and may threaten the government and the government at any time. business poses a serious threat

[0003] Our technical documents or confidential documents such as word files, dwg drawing files, etc. are all in plain text, and can be easily disseminated by participants and can be opened and used, such as some existing systems such as the firewall of Chinasoft, the network security of Renzihang Lines, etc. are just monitoring and cannot prevent this behavior from happening

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