Data uploading extender card device embedded in computer

Abstract

The invention relates to a data uploading transmission expansion card device internally embedded in a computer. The device is internally arranged in a target computer; the device consists of a unidirectional data transmission module and a computer expansion slot interface unit; the unidirectional data transmission module consists of a data channel unit, a data input interface unit, a control unit and a data output unit, a memorizing unit and a read-only memorizing unit. The device is the device which unidirectionally transmits the data on the external memorizer of the computer into the computer; the device is provided with an exclusive identifying number; the non-volatile memorizing unit is adopted for memorizing the history operation records of the device, thus improving the secrecy management performance of the device. Simultaneously, the data channel unit and a high-speed expansion slot interface are adopted by the device, thus greatly improving the transmission speed of data.

Description

technical field [0001] The invention relates to a computer-embedded data upload and transmission expansion card device, which belongs to the technical field of data security protection. Background technique [0002] Due to the needs of national information security, troops, government agencies and secret-related enterprises are all faced with how to ensure that low-secret equipment (including low-secret computers or low-secret storage bodies, such as U disks, mobile hard disks, CF cards, digital cameras, mobile phones, etc.) High-density devices (including high-density computers or high-density storage storage bodies, etc.) securely transmit file data. The so-called security is to ensure that during the data copy operation, the data can only be transferred from the low-secret level device to the high-secret level device in one direction, and the confidential data in the high-secret level device will not be leaked to the low-secret level device. At present, the commonly used...

AI Technical Summary

Problems solved by technology

This method is not only inefficient, but also if there is a Trojan horse virus in the portable device or human error, it will lead to the leakage of confidential data

In the published patent CN200710129797.5, a system to solve the above problems is proposed, but the one-way data transmission device involved in the system is external to the computer and cannot be built into the computer. Therefore, when the device is powered on and used every time, the user must manually Connecting two storage devices to the two interfaces of the data transmission device will be cumbersome for users who often use the device, and for users with limited space or who do not like external devices on the computer, all external devices will be hoped. built-in

In addition, the one-way data transmission device external to the computer must be connected to an interface of the computer, and these interfaces are all two-way data interfaces, so users can illegally skip the one-way data transmission device and directly connect the storage device with the confidential computer. The data interface is connected to copy data, so this kind of external data transmission device still has certain risks for confidential computers

like Figure 4 It is the structure of the one-way data transmission device proposed in the published patent CN200710129797.5, in which the processor needs to complete all the logic control, all data reading, all data processing and data output functions inside the system, resulting in the system can only be in A serial working state, so the performance requirements of the processor are very high, which increases the cost of the system and also limits the data transmission speed of the system, especially when transmitting large-capacity data files such as images and videos. The waiting time for data transmission can be very long

In addition, the system involved in this patent does not securely record the key historical information during the one-way data transmission operation, so it cannot provide strong evidence for the verification work after the leakage incident, and it is not convenient for confidentiality management.

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