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. The embedded computer structure further comprises a CPU, a power supply module, a program memory, a data memory, a data encryption module, and a high speed USB controller. The main technique comprises that: the uplink USB interface Slave is connected with a host computer, and the downlink USB interface Host is connected with a U-disk; the ''read access forbidden'' protection or ''U-disk encryption'' protection to the U-disk file data are realized by technical measures such as linkage driving of the uplink USB interface Slave and the downlink USB interface Host of the embedded computer, the file content discrimination, ''read forbidden'' or ''encryption'' and the like; the embedded computer is utilized to intercept the U-disk operating commands received by the uplink USB Slave 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 system information, 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 a "forbidden reading" or "encryption" protection function. Background technique [0002] With the rapid development of computer technology, the Internet has become an important guarantee for social development; it involves the country's government, military, culture, education, industry and many other fields. Many of the information stored, transmitted and processed are government macro-control decisions, commercial and economic information, energy resource data, scientific research data and other important information, and even involve 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 da...

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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