USB storage medium protector

Abstract

The invention discloses a USB storage medium protector comprising an internal embedded computer structure, two external high-speed USB interfaces, namely an uplink USB interface Slave and a downlink USB interface host; and a power supply. The uplink USB interface is connected with a host computer, and the downlink USB interface is connected with a U-disk; the embedded computer structure further comprises a CPU, a power supply module, a program memory, a data memory, a data encrypting module and a high-speed USB controller; the main technologies comprise the following steps: the linkage driving by an embedded computer, the uplink USB interface and the downlink USB interface; file content discrimination; and realization of read access forbidden protection or U-disk encryption protection to the U-disk file data by technical measures such as read forbidden or encryption and the like; the embedded computer is utilized to intercept the U-disk operating commands received by the uplink USB to judge whether the sector data needing to be read / written are file contents or not; if not, the sector data is shown to be a file information system, the normal reading / writing is carried out; and if so, the read forbidden or encryption / decryption protection is carried out.

Description

technical field [0001] The invention relates to the technical field of computer information security equipment, in particular to a USB storage medium protector with the protection function of "no reading" or "encryption". Background technique [0002] With the rapid development of computer technology, the Internet has become an important guarantee for social development; it involves the government, military, culture, education, industry and many other fields of the country. Many of the information stored, transmitted, and processed are important information such as government macro-control decisions, commercial economic information, energy resource data, scientific research data, and even state secrets; however, with the development of the Internet, loopholes in computers , Viruses, hackers, and frequent information and data security incidents, especially devices that can be connected to the network, no longer make people feel safe and secure, and the security of data storag...

AI Technical Summary

Problems solved by technology

[0003] The mobile storage medium based on the computer’s USB interface (referred to as U disk), because it is extremely convenient to use, is often used to transfer data and temporarily store important files between Internet computers and confidential computers; but the computer is very easy to be implanted with a "ferry" Trojan horse , the moment the U disk is inserted into the Internet computer, the data on the U disk will be stolen; some "ferry" Trojan horses are very powerful, even if the files that have been deleted or the U disk that has been quickly formatted, the remaining data will be stolen. stolen; some "ferry" Trojans can even hide the files stolen from the intranet host on the U disk, so that users do not know that once the U disk is used on the Internet host, it will be transmitted through the Internet, almost every year Both reported major leaks due to U disk Internet access

For the sake of confidentiality and security, safety measures such as burning CDs are taken, but these measures only achieve safety, but not convenience, and still bring a lot of inconvenience to the work. , how to effectively block the leaking channel of the U disk when it is used on the Internet computer is an urgent problem to be solved

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