TW202145032A - Method and system for automatically deleting data including a host apparatus and an external apparatus - Google Patents

Abstract

This invention relates to a method and a system for automatically deleting data, which include a host apparatus and an external apparatus, wherein the host apparatus executes an application to establish a state of connection with the external apparatus, and when the host apparatus uses a first data in the external apparatus, the host apparatus generates a second data associated with the first data in the host apparatus according to the first data; and when the host apparatus determines that the state of connection with the external apparatus is interrupted, the host apparatus deletes the second data in the host apparatus. Thus, not only is the risk of data leakage reduced, but also it is convenient to store and manage the data, thereby achieving the purpose of improving the data storage safety and the convenience in use.

Description

Data automatic deletion method and system

The present invention relates to an automatic data deletion method and system, in particular to an automatic data deletion method and system for automatically deleting data when the connection between devices is interrupted.

Nowadays, people are accustomed to storing data in a portable external device, such as a USB flash drive, SD memory card, flash drive or a mobile device that can be used as a flash drive, so that the data can be easily carried and used anywhere.

When the user needs to use the data stored in the external device, the external device is connected to a computer host, and the data in the external device is read through the computer host. And when the user reads the data in the external device through the computer host, the computer host will store a temporary file or record file related to the data. In addition, in order to efficiently execute the data in the external device in the computer device, the user often copies or transfers the data from the external device to the computer host.

However, when the data is used up, the user easily forgets to delete the data stored in the main body of the computer and related to the external device, so that the data is easily used by unscrupulous persons.

In addition, due to the increasing awareness of personal data protection among Chinese people, how to ensure that the data in the external device is not left in the public computer and reduce the risk of the data in the external device not being leaked is bound to become an important research and development direction.

In view of the above-mentioned problem in the prior art that when the external device is removed from the computer host, the user easily forgets to delete the data related to the external device in the computer host device, resulting in the malicious use of the data by unscrupulous persons, the present invention The main purpose of the invention is to provide an automatic data deletion method and system. When a host device detects that the connection state with an external device is interrupted, the host device automatically deletes the data related to the external device, thereby protecting the data. Do not leak.

A technical means adopted in order to achieve the above-mentioned purpose is to automatically delete the aforementioned data, which includes the following steps: The host device executes an application to establish a connection state with the external device; When the host device uses a first data in the external device, the host device generates a second data related to the first data in the host device according to the first data; When the host device determines that the connection state with the external device is interrupted, the host device deletes the second data in the host device.

In addition, another technical means adopted in order to achieve the above-mentioned purpose is to automatically delete the aforementioned data, including: a host device; and an external device connected to the host device; Wherein, the host device executes an application program to establish a connection state with the external device; when the host device uses a first data in the external device, the host device generates and communicates with the external device in the host device according to the first data The first data is related to a second data; when the host device determines that the connection state with the external device is interrupted, the host device deletes the second data in the host device.

In the present invention, when the host device determines that the connection state with the external device is interrupted, the host device deletes the second data corresponding to the first data stored in the host device, so as to avoid the user forgetting to delete the data , causing problems such as data being used and stolen by intentional people, which can improve the security of data storage and the convenience of data use.

For the preferred embodiment of the data automatic deletion system of the present invention, please refer to FIG. 1, which includes an external device 10 and a host device 20. The external device 10 is hot-plugged or wireless communication such as Wi-Fi, Bluetooth The host device 20 is connected to the host device 20 by means of Bluetooth, etc., wherein, when the external device 10 is connected to the host device 20, the host device 20 executes an application program to establish a connection state with the external device 10. When the external device 10 is connected to the host device 20 When the device 10 is removed (unplugged) from the host device 20, the connection state is interrupted. In this embodiment, the external device 10 may be an external device with a function of storing data, such as a USB flash drive, a memory card, an OTG flash drive, a mobile device used as an OTG flash drive, a wireless flash drive, or the like; The host device 20 may be a computer device.

The external device 10 includes a first communication unit 11 , a control unit 12 and a first storage unit 13 , the control unit 12 is connected to the first communication unit 11 and the first storage unit 13 , the first communication unit 11 and the The host device 20 is connected for communication, the control unit 12 is used for processing information, the first storage unit 13 stores more than one piece of first data, the first communication unit 11 can be a Universal Serial Bus (USB) or Supporting wireless communication interfaces such as Wi-Fi and Bluetooth, the control unit 12 can be a smart chip.

The host device 20 includes a second communication unit 21, a processing unit 22 and a second storage unit 23. The processing unit 22 is connected to the second communication unit 21 and the second storage unit 23. The second communication unit 21 is connected to the second communication unit 21 and the second storage unit 23. The first communication unit 11 is connected for communication, the processing unit 22 processes the received information and executes related application programs, the second storage unit 23 stores data, and the second communication unit 21 may be a universal serial bus (Universal Serial Bus). Bus, USB) or support wireless communication interfaces such as Wi-Fi, Bluetooth, etc. Specifically, the second communication unit 12 can be connected to the first communication unit 11 by hot-plug or wireless communication such as Wi-Fi, Bluetooth, etc. .

In use, the automatic data deletion method of the present invention is executed by the automatic data deletion system. Please refer to FIG. 2 together. A preferred embodiment of the automatic data deletion method includes the following steps: The host device 20 executes the application and establishes a connection state with the external device 10 (S201); When the host device 20 uses the first data in the external device 10, the host device 20 generates a second data related to the first data in the host device 20 according to the first data (S202); The host device 20 determines whether the connection state with the external device 10 is interrupted ( S203 ), and when the host device 20 determines that the connection state with the external device 10 is interrupted, the host device 20 deletes the Second data (S204).

In this embodiment, the step of using the first data in the external device 10 by the host device 20 includes reading, copying or saving the first data in the external device 10 by the host device 20 .

In this way, when the host device 20 determines that the connection state with the external device 10 is interrupted, the host device 20 will delete the second data corresponding to the first data stored in the host device 20 to avoid Because the user forgets to delete the data, the data is used or stolen by the intentional person, which can improve the security of the data storage and the convenience of the data use.

Further, please refer to FIG. 3 , the external device 10 prestores an identification table, and the identification table records at least one identification comparison information. When the user plugs the external device 10 into the host device 20 in a hot-plug manner to connect the first communication unit 11 and the second communication unit 21, the user makes the host device 20 execute the application through operation program. When the processing unit 22 of the host device 20 executes the application program, the processing unit 22 of the host device 20 sends an identification information to the first communication unit 11 of the external device 10 through the second communication unit 21 ( S301 ) ), and the control unit 12 of the external device 10 determines whether the received identification information is the same as the identification comparison information in the identification table according to the identification information (S302). When the control unit 12 of the external device 10 determines that the identification comparison information is the same as the identification information, the external device 10 establishes a connection state with the host device 20 (S303). As shown in FIG. 4A, when the user needs to use the first data in the first storage unit 13, the processing unit 22 of the host device 20 generates and matches the first data in the host device 20 according to the first data A related second data (S304) is stored in the second storage unit 23, and the processing unit 22 of the host device 20 determines whether the connection state with the external device 10 is interrupted (S305). As shown in FIG. 4B , when the processing unit 20 of the host device 20 determines that the connection state with the external device 10 is interrupted, the processing unit 20 of the host device 20 deletes the second data in the host device 20 ( S306). In this embodiment, the application program may be pre-installed in the host device 20 , or the application program may be stored in the external device 10 . When the external device 10 is connected to the host device 20 , the external device 10 will transmit the application to the host device 20 for installation.

In this embodiment, the second data includes at least one of a temporary file of the first data, a copied file of the first data, or an edited file of the first data.

Further, the second storage unit 23 of the host device 20 also stores a data record table, and when the host device 20 generates the second data, the application program of the host device 20 records an address of the second data information into the data record table. When the host device 20 determines that the connection state of the external device is interrupted, the application program of the host device 20 deletes the second data according to the address information in the data record table. In this embodiment, the data record table records information such as the name, address, and creation time of the second data.

For example, when the user uses the first data of the external device 10 through the host device 20 , the application program of the host device 20 will record the path address of the second data stored in the second storage unit 23 , that is, the address information (as shown in Table 2), so when the connection between the external device 10 and the host device 20 is interrupted, the host device 20 can delete the second data according to the address information.

Further, when the host device 20 generates the second data, the application program of the host device 20 assigns a flag to the second data. When the host device 20 determines that the connection state with the external device 10 is interrupted, the application program of the host device 20 searches for the second data in the host device 20 according to the flag and deletes the second data.

That is to say, when the host device 20 generates the second data, the application program of the host device 20 can directly record the address information of the second data, or give the second data the mark for use when When the connection between the host device 20 and the external device 10 is interrupted, the application program of the host device 20 can find the second data in the host device 20 according to the address information or the tag and delete it.

Further, please refer to FIG. 5A and FIG. 5B , since the external device 10 and the host device 20 may be used by different users at the same time, in order to effectively distinguish between different users using the external device 10 through the host device 20 The authority of the first data, the first data of the external device 10 is set with a first confidentiality level, and the identification table of the external device 10 further records a use authority level corresponding to the identification comparison information, as shown in Table 1 . In this embodiment, the identification comparison information of the external device 10 includes an identification code, a password or a computer identification data, and the identification information sent by the host device 20 includes a user account and a password, or A computer identification code, such as: computer name, globally unique identifier (GUID) or universally unique identifier (UUID). Identifier password Use permission level User123 123 4 User456 456 3 User789 789 2 PC123 - 2 PC456 - 1 Table 1

For example, the external device 10 can determine whether the identification code and password in the identification information are the same according to the user account and password in the received identification information, thereby confirming the identification information and the identification and comparison information. are the same, and the user account number and the password in the identification information can be input by the user through the application program operating the host device 20, and the host device 20 transmits the identification information input by the user to The external device 10 . Or the identification information only has a computer identification code, and the identification code of the identification comparison information is computer identification data, the external device 10 can be based on the computer identification code in the identification information and the identification comparison information. The computer identification data of the computer determines whether the identification information is the same as the identification comparison information. Since the computer identification code and the computer identification data can be a long string of garbled data, GUID, or UUID, they are not easy to be stolen by others and still have considerable confidentiality. Therefore, the computer identification code is compared with the computer identification data. , you do not need to set additional passwords for comparison and verification.

When the host device 20 executes the application program, the host device 20 transmits the identification information to the external device 10 ( S501 ) for the external device 10 to determine whether the identification information is the same as the identification comparison information ( S502 ). When the external device 10 determines that the identification comparison information is the same as the identification information, the external device 10 grants the host device 20 the use authority level corresponding to the identification comparison information that is the same as the identification information (S503), and the The host device 20 establishes a connection state with the external device 10 (S504). When the user needs to use the first data in the first storage unit 13, the host device 20 requests the external device 10 to use the first data (S505), and the external device 10 determines the first data of the first data Whether a secret level is lower than the usage authority level (S506). When the external device 10 determines that the first confidentiality level is lower than the use authority level, the external device 10 allows the host device 20 to use the first data ( S507 ), and the host device 20 uses the first data that is allowed to be used. Second data related to the allowed first data is generated in the host device 20 (S508), and the host device 20 determines whether the connection state with the external device 10 is interrupted (S509). When the processing unit 20 of the host device 20 determines that the connection state with the external device 10 is interrupted, the host device 20 deletes the second data in the host device 20 (S510).

For example, as shown in Table 1 and FIG. 6A , if the user account in the identification information of the host device 20 is User456 and the password is 456, the external device 10 can determine the same identification as the identification information according to the identification table The use authority level corresponding to the comparison information is 3, and the first storage unit of the external device 10 stores a plurality of first data, respectively: a first data a, the set first confidentiality level is LV1; a first data For data b, the set first confidentiality level is LV2; for a first data c, the set first confidentiality level is LV3; for a first data d, the set first confidentiality level is LV4; therefore, the external device 10 judges the Only the first data a and the first data b have the first confidentiality level lower than the use authority level, and the external device 10 only allows the host device 20 to use the first data a and the first data b. Therefore, the host device 20 can only generate a corresponding second data a and a second data b in the host device 20 according to the first data a and the first data b. And as shown in FIG. 6B , when the processing unit 20 of the host device 20 determines that the connection state with the external device 10 is interrupted, the host device 20 deletes the second data a and the second data in the host device 20 b.

Further, as shown in FIGS. 7A and 7B , the first data is provided with the first confidentiality level, and the host device 20 is preset with a data retention level. When the host device 20 generates the second data, the application program of the host device 20 gives the second data a second confidentiality level, the second confidentiality level is the same as the first confidentiality level of the first data, and The second secret level is recorded in the data record table, as shown in Table 2. When the host device 20 determines that the connection with the external device 10 is disconnected, and when the application of the host device 20 determines that the second confidentiality level is higher than the data retention level, the application of the host device 20 deletes the first Second data, otherwise, the second data will not be deleted. Data name Second Class Secret address information second information a LV1 C:\record\data1 second data b LV2 C:\record\data2 second data c LV3 C:\record\data3 second data d LV4 C:\record\data4 Table 2

That is, when the host device 20 executes the application program, the host device 20 transmits the identification information to the external device 10 (S701) for the external device 10 to determine whether the identification information is the same as the identification comparison information (S701). S702). When the external device 10 determines that the identification matching information is the same as the identification information, the external device 10 grants the host device 20 the use authority level corresponding to the identification matching information that is the same as the identification information (S703), and the The host device 20 establishes a connection state with the external device 10 (S704). When the user needs to use the first data in the first storage unit 13, the host device 20 requests the external device 10 to use the first data (S705), and the external device 10 determines the first data of the first data Whether a secret level is lower than the usage authority level (S706). When the external device 10 determines that the first confidentiality level is lower than the use authority level, the external device 10 allows the host device 20 to use the first data ( S707 ), and the host device 20 uses the allowed first data in the The host device 20 generates second data related to the allowed first data (S708), and the host device 20 determines whether the connection state with the external device 10 is interrupted (S709).

Further, when the processing unit 20 of the host device 20 determines that the connection state with the external device 10 is interrupted, the host device 20 determines whether the second confidentiality level of the second data is higher than the data retention level (S710) . When the second confidentiality level of the second data is higher than the data retention level, the host device 20 deletes the second data in the host device 20 (S711). Conversely, when the second confidentiality level of the second data is not higher than the data retention level, the host device 20 does not delete the second data (S712).

For example, as shown in Table 1, Table 2 and FIG. 8A, if the preset data retention level of the host device 20 is 3, and the user account in the identification information of the host device 20 is User123 and the password is 123, Then the external device 10 can determine according to the identification table that the use authority level corresponding to the identification matching information that is the same as the identification information is LV4, and the first storage unit of the external device 10 stores the first data a, the first Data b, the first data c and the first data d. Therefore, the external device 10 determines that the first confidentiality level is lower than the use authority level including the first data a, the first data b, the first data c and the first data d, and the external device 10 allows The host device 20 uses the first data a, the first data b, the first data c and the first data d. Therefore, the host device 20 can generate the corresponding second data a and the second data in the host device 20 according to the first data a, the first data b, the first data c and the first data d b. The second data c and the second data d, and the second data confidentiality levels of the second data a, the second data b, the second data c and the second data d are respectively the same as the first data a. The first confidentiality levels of the first data b, the first data c, and the first data d are the same, which are LV1, LV2, LV3, and LV4, respectively.

And as shown in FIG. 8B , when the processing unit 20 of the host device 20 determines that the connection state with the external device 10 is interrupted, the host device 20 determines that the second confidentiality level of the second data is higher than that of the data retention level. There is only the second data d. Therefore, the host device 20 only deletes the second data d in the host device 20, and does not delete the second data whose second confidentiality level is not higher than the data retention level. Two data a, the second data b and the second data c.

To sum up, with the method and system for automatic data deletion provided by the present invention, when the external device is connected to the host device to use the data of the external device, there is no need to worry about the problem of data outflow caused by the important data of the external device being left on the host device. Trends in national regulations regarding the custody of important data, in particular, the right to be forgotten under the EU General Data Protection Regulation (GDPR). In one embodiment, the identification information can be used to grant a permission level and establish a connection state between the host device and the external device, thereby increasing the security level of connection and data usage. In one embodiment, the removal and retention of relevant data in the host device can be determined according to the data confidentiality level and the data retention level of the host device, only data with higher confidentiality levels are deleted and data with lower confidentiality levels are retained, and data deletion and retention are increased. elasticity.

However, the above descriptions are merely examples of the present invention, which should not limit the scope of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the patent specification are still within the scope of the present invention. The scope of the invention patent

10: External device 11: The first communication unit 12: Control unit 13: The first storage unit 20: Host device 21: The second communication unit 22: Processing unit 23: Second storage unit S201~S204, S301~S306, S501~S510, S701~S712: Steps

FIG. 1 is a block diagram of a system architecture of a preferred embodiment of the present invention. FIG. 2 is a flow chart of a method according to a preferred embodiment of the present invention. FIG. 3 is a flow chart of a method according to a preferred embodiment of the present invention. 4A and 4B are schematic block diagrams of a preferred embodiment of the present invention. 5A and 5B are flowcharts of a method according to a preferred embodiment of the present invention. 6A and 6B are schematic block diagrams of a preferred embodiment of the present invention. 7A and 7B are flowcharts of a method according to a preferred embodiment of the present invention. 8A and 8B are schematic block diagrams of a preferred embodiment of the present invention.

10: External device

11: The first communication unit

12: Control unit

13: The first storage unit

20: Host device

21: The second communication unit

22: Processing unit

23: Second storage unit

Claims (10)

A method for automatically deleting data, comprising the following steps: A host device executes an application program to establish a connection state with an external device; When the host device uses a first data in the external device, the host device generates a second data related to the first data in the host device according to the first data; When the host device determines that the connection state with the external device is interrupted, the host device deletes the second data in the host device. The automatic data deletion method according to claim 1, wherein the external device prestores an identification table, and the identification table records at least one identification comparison information; Wherein, when the host device executes the application program, the host device transmits an identification information to the external device, and when the external device determines that the identification comparison information is the same as the identification information, the external device establishes a connection with the host device the connection status. The automatic data deletion method according to claim 2, wherein the first data is provided with a first confidentiality level, and the identification table further records a use authority level corresponding to the identification comparison information; Wherein, when the external device determines that the identification comparison information is the same as the identification information, the external device grants the host device the use authority level corresponding to the identification comparison information that is the same as the identification information; Wherein, when the external device determines that the first confidentiality level is lower than the use authority level, the external device allows the host device to use the first data. The automatic data deletion method according to claim 1, wherein the host device stores a data record table; Wherein, when the host device generates the second data, the application program of the host device records an address information of the second data in the data record table; Wherein, when the host device determines that the connection state with the external device is interrupted, the application program of the host device deletes the second data according to the address information in the data record table. The automatic data deletion method as described in claim 1, wherein when the host device generates the second data, the application program of the host device assigns a flag to the second data; Wherein, when the host device determines that the connection state with the external device is interrupted, the application program of the host device searches for the second data in the host device according to the flag and deletes the second data. The data automatic deletion method according to claim 4 or 5, wherein the first data has a first confidentiality level, and the host device is preset with a data retention level; Wherein, when the host device generates the second data, the application program of the host device gives the second data a second confidentiality level, the second confidentiality level is the same as the first confidentiality level of the first data; Wherein, when the host device determines that the connection with the external device is disconnected, and when the application program of the host device determines that the second confidentiality level is higher than the data retention level, the application program of the host device deletes the second data . The automatic data deletion method according to claim 1, wherein the step of using the first data in the external device by the host device includes reading, copying or saving the first data in the external device by the host device. The automatic data deletion method according to any one of claims 1 to 5 and 7, wherein the second data includes a temporary file of the first data, a copied file of the first data, or the edited first data file at least one. The automatic data deletion method according to claim 6, wherein the second data includes at least one of a temporary file of the first data, a duplicate file of the first data, or an edited file of the first data. An automatic data deletion system, comprising: a host device and an external device; Wherein, the host device and the external device execute the data automatic deletion method described in any one of claim 1 to 9.

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