Method, system and transmission card for safe data transmission between internal and external networks

Abstract

The invention discloses a system for securely transmitting data between an external network and an internal network and a method thereof, which includes the following steps: a user logs in a client terminal; the user accesses a sending folder and sends files to be sent to a transmission server of the user by a network A; the transmission server inspects the file formats deeply according to the authority of the user, and if the depth inspection is finished successfully, the transmission server sends the file to a receiving folder corresponding to a transmission server of a receiving user by the transmission system, and if not, the file is refused to be transmitted; the receiving user can take the file from the transmission server of the receiving user on a network B and use the file. As all USB ports are shielded in the internal network ,and a transmission card and a transmission wire are used for transmitting by a protocol and transmission method, the transmission system and the method avoid the hidden trouble of network security and various types of Trojan house viruses are blocked at the outside; the very good security effect on the data transmission between the internal network and the external network is achieved; the attack to IP by hackers is prevented and the spread of viruses is blocked, virus libraries need not to be upgraded continuously, and the cost is low.

Description

technical field [0001] The invention relates to the fields of computer software and network information, in particular to a method for securely transmitting data between a computer and a disk, in particular to a method, a system and a transmission card for securely transmitting data between internal and external networks. Background technique [0002] With the rapid development of computer multimedia technology and network technology, the traditional broadcasting methods of radio stations have gradually been completely replaced by networked broadcasting systems; each radio station has also gradually built its own core network - audio network ( Intranet); Most of the programs are produced and broadcast through this audio network every day. [0003] The biggest advantage of the network is resource sharing and interconnection; however, network applications must be considered from the perspective of security in radio stations, and safe broadcasting is always the first; it is als...

AI Technical Summary

Problems solved by technology

[0005] 1. Frequency is the most valuable resource of a radio station and the basis for its survival; however, the same content on multiple frequencies can no longer attract listeners; in order to improve market competitiveness, all radio stations are vigorously developing specialized and personalized frequencies; and The specialization of frequencies has higher and higher requirements for the timeliness of program content, and the demand for program materials is increasing; the original resources of the audio network are far from meeting the needs of the development of each frequency, and they all need to be from Get richer resources from the outside world (external network)

[0006] 2. At present, all radio stations are replacing digital interview machines in large numbers, and the transmission means of digital interview machines are all USB interfaces

[0012] Existing problems: low efficiency, heavy workload, unable to meet the needs of the current radio station for a large number of external audio resources;

[0014] Existing problems: the firewall only plays a certain protective role against hacker intrusion, but it cannot absolutely prevent hackers from attacking IP, nor can it block the spread of viruses

[0016] Existing problems: Due to the passive lag defect of the anti-virus software itself, the virus database needs to be continuously upgraded, and it cannot actively protect against new viruses

[0018] Existing problems: large investment, limited isolation, unable to effectively block the spread of the virus

[0020] Existing problems: At least one USB interface needs to be turned on on the intranet, which poses hidden dangers to the security of the intranet

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