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An interface circuit and control method for connecting a download key
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An interface circuit and interface technology, applied in the field of external device downloads, can solve problems such as user information leakage, security risks, and user property damage.
Active Publication Date: 2017-09-15
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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Problems solved by technology
When a user loses a mobile device that stores important information or personal information, criminals may directly connect the host computer and the user's mobile device through a common transmission line or transmission interface, and then download the reorganization system software or decrypt the file from the host computer to the mobile device. Password software and other software to crack the password of the user's mobile device, steal the user's personal information or other important information, and eventually cause the leakage of the user's information, which has caused a great security risk to the user using the mobile device, and may also cause the user's property loss
Method used
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Embodiment 1
[0037] refer to figure 1 , is a schematic diagram of an interface circuit connected to a download key provided in Embodiment 1 of the present invention. This embodiment is applicable to the case of performing download protection on a mobile device.
[0038] An interface circuit for connecting a download key provided in Embodiment 1 includes: a download key integrated circuit Download Key IC110, an interface 120 and a mobile device, wherein the interface 120 is coupled between the mobile device and the Download Key IC110 between.
[0039] The interface 120 has multiple pins, such as the ground terminal GND-3, the identification terminal ID, and the negative voltage data terminal D-, which are respectively connected to the Download Key IC110. The interface 120 also has other pins, such as GND -4, GND-2, GND-7, GND-6, GND-5, GND-1 are grounded respectively. The Download Key IC110 has multiple pins, such as a feedback terminal S / W, an enable terminal EN, and a data terminal SDA....
Embodiment 2
[0055] refer to figure 2 As shown, it is a flow chart of a control method for an interface circuit connected to a download key provided by Embodiment 2 of the present invention. This embodiment is applicable to the case of performing download protection on a mobile device.
[0056] Embodiment 2 of the present invention provides a control method based on the interface circuit described in Embodiment 1, including:
[0057] Step 210, the Download Key IC transmits a reverse selection signal to the mobile device through the ground terminal of the interface.
[0058] As mentioned above, the Download Key IC feeds back the reverse selection signal to the mobile device to indicate that the Download Key IC has successfully connected to the interface circuit, and the mobile device uses the reverse selection signal to select the DownloadKey IC that has successfully connected to the interface circuit for decryption And verification. In addition, the interface and the Download Key IC als...
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Abstract
The invention discloses an interface circuit connected with a download key and a control method. The circuit comprises the download key, an interface and mobile equipment, wherein the interface is coupled between the mobile equipment and the download key; the ground wire end of the interface is connected with the feedback end of the download key, the negative-voltage data end of the interface is connected with the enabling end of the download key, and the identification end of the interface is connected with the data end of the download key; the download key is used for transmitting a reverse selection signal to the mobile equipment through the ground wire end; after receiving the reverse selection signal, the mobile equipment is used for transmitting an enabling signal to the download key through the negative-voltage data end in order to control the opening of the download key; and the mobile equipment is used for reading encrypted identification information in the download key through the identification end, decrypting the read encrypted identification information, verifying the decrypted identification information if decryption succeeds, and judging whether or not to execute a download process according to a verification result. Download protection is performed on the mobile equipment through the external download key.
Description
technical field [0001] The invention relates to an external device download technology, in particular to an interface circuit and a control method for connecting a download key. Background technique [0002] With the rapid development of electronic technology, mobile devices are gradually becoming more diversified. In the process of using mobile devices, system upgrades, system reorganizations, and software downloads of mobile devices are becoming more and more common. [0003] The existing mobile device download method usually directly downloads related applications or software from the host computer through a common data transmission protocol, and the transmission lines or transmission interfaces connecting different mobile devices to the host computer may be common. When a user loses a mobile device that stores important information or personal information, criminals may directly connect the host computer and the user's mobile device through a common transmission line or...
Claims
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Application Information
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