TWM453882U - Data secure device with NFC module - Google Patents

Description

Data security device using near field communication module

The present invention relates to a security device for a storage device, and more particularly to a method for controlling the read and write permissions of a storage device by using a near field communication device to prevent unauthorized users from accessing the storage device.

With the development of storage technology, the volume of various storage devices has not only gradually decreased, but its storage capacity has gradually increased. The high speed of the access interface used with the storage device and the plug-and-play characteristics (such as Universal Serial Bus (USB)) enable people to carry and copy various types of data quickly and easily.

However, due to the more convenient data replication and the increase in portability of storage devices, it has also caused hidden concerns in information security. A large amount of data may be stolen by an unauthorized user in the above-mentioned high-speed and plug-and-play storage device, or may be obtained by other unauthorized users due to the user's accidental loss of the storage device.

Although the data in the storage device can be protected by setting a password, etc., when the amount of data stored by the user is increased, it is very cumbersome for the user to memorize the password, and the user's usage habits are different. Most people often use the same set of passwords on all data, which is not enough in terms of protection. Once the password is outflowed, all the confidential information of the user will be quickly stolen in a short time, which is not convenient in use. Safety.

In view of the above shortcomings, existing storage devices need to be improved.

The purpose of the present invention is to provide a data security device using a near field communication module, which utilizes a near field communication function as a read and write authority for controlling a storage device to prevent unauthorized users from accessing the storage device.

In order to achieve the above object, the data security device of the near field communication module of the present application is electrically connected between the control chip of a storage device and its access interface to cut or turn on between the control chip and the access interface. The security device includes: a switch unit disposed between the access interface and the control chip to turn on or off the access interface and control the wafer; and a microprocessor coupled to the switch unit to control the conduction of the switch unit Or disconnected; a near field communication module connected to the microprocessor to receive a cryptographic signal; and a timing unit coupled to the near field communication module and the microprocessor, the microprocessor reading the status of the timing unit The elapsed time after the near field communication module receives the cipher signal is determined, wherein if the cipher signal is correct and the cipher signal is received after a predetermined time has elapsed, the microprocessor turns on the switch unit.

In another preferred embodiment, the near field communication module includes a near field communication chip and a sensing antenna, and the near field communication chip is configured to receive and determine whether the cryptographic signal is correct.

In another preferred embodiment, the near field communication chip includes an unlocking flag, and the unlocking flag is set if the password is correctly determined.

In another preferred embodiment, the microprocessor determines that the near field communication module has not exceeded the preset time after receiving the cryptographic signal, and then clears the unlocking flag.

In another preferred embodiment, the switching unit is configured as an analog switch IC.

In another preferred embodiment, the timing unit is a charge/discharge circuit composed of a resistor and a capacitor, and the power is obtained by the near field communication module.

In another preferred embodiment, a matching circuit is provided between the sensing antenna and the near field communication chip to adjust the signal received by the sensing antenna.

In another preferred embodiment, the access interface is configured as a USB connector.

The feature of this creation is that the security device uses the entity's Near Field Communication Reader (NFC READER) to directly enter the password, which avoids the risk of the user forgetting the password or the password outflow. In conjunction with the timing unit, if the access operation is not performed within a certain period of time after using the near field communication reader to sense (enter the password), the security device will automatically resume the locked state to prevent the data from being subjected to other unauthorized operations. User use.

10‧‧‧secure device

20‧‧‧Switch unit

30‧‧‧Microprocessor

40‧‧‧ Near Field Communication Module

41‧‧‧ Near Field Communication Chip

42‧‧‧Sensor antenna

43‧‧‧Matching circuit

50‧‧‧Time unit

51‧‧‧resistance

52‧‧‧ Capacitance

90‧‧‧Storage device

91‧‧‧ memory unit

92‧‧‧Access interface

93‧‧‧Control chip

94‧‧‧PC

95‧‧‧ Near Field Communication Reader

The first figure is a block diagram of the components of the present creation security device.

The second figure is a circuit diagram of the creation security device.

The third figure is an unlocking flowchart of the creation secret unlocking device inputting the unlocking password by the near field communication reader.

The fourth picture is an unlocking flowchart of the creation secret device inserted into the personal computer.

In order to explain in detail the technical content, structural features, goals and effects of the present invention, the following is a detailed description with reference to the drawings.

Referring to the first figure, the data security device 10 of the application near field communication module is electrically connected between the memory unit 91 of a storage device 90 and its access interface 92, when an unlicensed user attempts to save When the data is fetched, the data outflow can be avoided by cutting off the connection between the memory unit 91 and the access interface 92. The security device 10 includes a switch unit 20 connected between the access interface 92 and the memory unit 91. A microprocessor 30 is connected to the switch unit 20 and controls the open state of the switch unit 20; The field communication module 40 receives the near field communication signal and the password; and a timing unit 50 is connected to the near field communication module 40 and the microprocessor 30 and has a signal level conversion function for determining the near field communication module 40. The elapsed time after receiving the near field communication signal and password.

Please refer to the second figure. The USB flash drive is used as an example to illustrate the structure and function flow of this creation. The USB flash drive includes a plurality of memory units 91 for storing data, a USB connector for accessing the interface 92, and a control chip 93 for controlling the USB flash drive. The USB connector receives power and control signals from the personal computer 94, and also receives power from the personal computer 94 and supplies it to the memory unit 91, the control chip 93, and the microprocessor 30. The switching unit 20 is configured as an analog switch IC. The analog switch IC is connected between the USB connector and the control chip 93 and further electrically connected to the microprocessor 30, and can be controlled according to the signal sent by the microprocessor 30. The connection state of the interface 92 and the control wafer 93 is taken.

The microprocessor 30 is electrically connected to the near field communication module 40 and the timing unit 50 at the same time, and has a built-in program for automatically recognizing the password and unlocking after power-on. In the present embodiment, the near field communication module 40 includes a near field communication chip 41, an inductive antenna 42 and a matching circuit 43 connected between the inductive antenna 42 and the near field communication chip 41, and in the near field communication chip 41. A non-volatile memory for storing signals is provided. The timing unit 50 The charging/discharging circuit is composed of a resistor 51 and a capacitor 52. The charging/discharging circuit is connected to the near field communication module 40 and the microprocessor 30, and can be powered by the near field communication module 40 for charging. .

If the user directly connects the created USB flash drive to the personal computer 94, since the microprocessor 30 does not receive any unlocked passwords and instructions, the analog switch IC is preset to prevent any data access. In addition, since the connection between the access interface 92 and the internal control chip 93 is cut off, the USB flash drive in this state does not transmit any information to the personal computer 94. An unsuspecting user will mistakenly believe that the USB flash drive has been damaged, thereby preventing the user from continuing to try to access the data in the flash drive.

Referring to the second to fourth figures, the process of unlocking the creation can be divided into a first stage of inputting a password by the near field communication reader 95, and a second stage of unlocking by the microprocessor 30 after accessing the personal computer. .

When the user wants to access the data in the USB flash drive, the USB flash drive needs to be sensed by the paired near field communication reader 95 (NFC READER) (as shown in the first figure), and the unlocked The password is transmitted to the near field communication module 40. When the sensing starts, the near field communication module 40 is activated, and the communication chip 41 compares whether the unlocking password is correct (steps 101 and 102 of the third figure). If the password is correct, the password will be set. The unlock flag (103) will return to step 100 to continue to compare whether the unlock password is correct.

At this time, since the near field communication uses the magnetic field coupling between the sensing antenna 42 (electromagnetic coil) to transmit signals and power, the near field communication reader 95 and the near field communication module 40 in the USB flash drive start to be performed. In the sensing, in addition to transmitting the unlocking code to the near field communication module 40, the power required by the near field communication module 40 during operation can be synchronously supplied. Thus, upon sensing, the near field communication module 40 will obtain a power supply and simultaneously charge the capacitor 52 in the charge/discharge circuit. After the USB flash drive and the near field communication reader 95 are sensed, the capacitor 52 in the timing unit 50 will begin to discharge. The specific time during which the capacitor 52 is completely discharged is affected by the capacitance value and the resistance value. In this embodiment, whether the capacitor 52 is completely discharged or not is used as a basis for whether or not the timeout is unlocked.

Referring to the fourth figure, after the user connects the USB flash drive to the personal computer 94, the microprocessor 30 will immediately start the second stage after receiving power from the personal computer 94. Unlock the program, the process is as follows:

First, the microprocessor 30 takes power from the personal computer 94 through the USB connector and activates (200); then the microprocessor 30 reads the unlocking flag stored in the near field communication module 40 and compares it (201); If the unlocking flag cannot be read, return to step 201 to re-align the unlocking flag. If the unlocking flag is confirmed, confirm whether the charging/discharging circuit has been completely discharged (202); if the charging/discharging circuit is completely exhausted, then Go to step 201 to re-compare the password; if there is still enough power in the charging/discharging circuit, the unlocking flag is cleared and the analog switch IC (203) is unlocked, and the user is allowed to access the data in the USB flash drive (204).

Finally, when the user pulls the USB flash drive from the personal computer, the microprocessor 30 will return to the preset value after losing the power supply, and the USB flash drive is restored to the locked state.

By the above double comparison action, in addition to ensuring that the USB flash drive data can only be accessed by the permitted user; and has the function of timeout protection and automatic locking after access. If the sensor input password is not inserted into the personal computer for a certain period of time, the USB flash drive will be re-locked, and once it is removed from the personal computer, it will be re-locked. This will prevent the USB flash drive from being unlocked and other unauthorized. The user removes and accesses the data in it.

In summary, the security device 10 in the present creation uses the physical near field communication reader 95 (NFC READER) to directly input the password, thereby avoiding the risk of the user forgetting the password or the password outflow. In conjunction with the timing unit 50, if the access operation is not performed within a certain period of time after the proximity communication reader 95 is used (input password), the security device 10 will be automatically locked to avoid being unlocked and otherwise not being used. Used by licensed users.

10‧‧‧secure device

20‧‧‧Switch unit

30‧‧‧Microprocessor

40‧‧‧ Near Field Communication Module

50‧‧‧Time unit

90‧‧‧Storage device

91‧‧‧ memory unit

92‧‧‧Access interface

94‧‧‧PC

95‧‧‧ Near Field Communication Reader

Claims (8)

A data security device for applying a near field communication module is electrically connected between a control chip of a storage device and an access interface thereof for cutting or conducting a connection between a control chip and an access interface, the security device comprising: a switching unit disposed between the access interface of the storage device and the control chip to turn on or off the access interface and control the wafer; a microprocessor connected to the switch unit to control the conduction or disconnection of the switch unit; The near field communication module is connected to the microprocessor to receive a cryptographic signal; and a timing unit is connected to the near field communication module and the microprocessor, and the microprocessor reads the state of the timing unit to determine the near field communication. The elapsed time after the module receives the cipher signal; wherein if the cipher signal is correct and the cipher signal has not been exceeded for a preset time, the microprocessor turns on the switch unit. The data security device for applying the near field communication module according to claim 1, wherein the near field communication module comprises a near field communication chip and an inductive antenna, and the near field communication chip is used for receiving and judging. The password signal is correct. The data security device for applying the near field communication module according to claim 2, wherein the near field communication chip includes an unlocking flag, and if the password is judged to be correct, the unlocking flag is set. The data security device for applying the near field communication module according to claim 3, wherein the microprocessor determines that the near field communication module has not exceeded the preset time after receiving the cryptographic signal, and then clears the unlocking flag. The data security device for applying the near field communication module according to claim 4, wherein the switch unit is configured as an analog switch IC. The data security device for applying the near field communication module according to claim 5, wherein the timing unit is a charging/discharging circuit composed of a resistor and a capacitor, and the power is obtained by the near field communication module. The data security device for applying the near field communication module according to claim 6, wherein a matching circuit is disposed between the sensing antenna and the near field communication chip to adjust the signal received by the sensing antenna. A data security device for applying a near field communication module as described in claim 7 of the patent scope, The access interface is set to a USB connector.