Portable storage device capable of rapidly clearing data and expanding capacity
By using the interface body composed of the T680 security chip and the RK3399 chip, and the capacity expansion module of the DDR chip, the problems of data leakage and capacity expansion in portable storage devices are solved, and rapid data erasure and secure capacity expansion are achieved.
Patent Information
- Application Number
- CN202510959199.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-11
- Publication Date
- 2025-10-31
AI Technical Summary
Existing portable storage devices pose a risk of data leakage, and data erasure is time-consuming and capacity expansion is complex, making it difficult to meet user needs.
The interface body is composed of T680 security chip and RK3399 chip, combined with DDR chip capacity expansion module. It realizes fast data clearing and capacity expansion through encryption and decryption module, and uses destruction switch to cut off power to ensure that the data is unrecoverable.
It enables rapid data erasure and flexible capacity expansion, ensuring data security against theft and preventing information recovery after power failure, thus meeting diverse user needs.
Smart Images
Figure CN120874145A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of information security technology storage, and more specifically, it relates to a convenient storage device that can quickly erase data and expand capacity. Background Technology
[0002] In today's era of global digital transformation, data has become a core asset for businesses and individuals, presenting unprecedented challenges to its secure storage and efficient management. While traditional portable storage devices like USB flash drives have become important tools for data transfer due to their compact size and ease of use, they are also prone to security vulnerabilities. Statistics show that tens of thousands of data breaches occur annually due to lost or stolen USB flash drives, involving sensitive information such as trade secrets and personal privacy, resulting in economic losses exceeding tens of billions of yuan. Furthermore, existing storage devices often require formatting by the host machine for data erasure, which is time-consuming; capacity expansion also suffers from poor interface compatibility and complex expansion processes, failing to meet the increasingly diverse needs of users. Summary of the Invention
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and propose a convenient storage device that can quickly erase data and expand capacity. The capacity is expandable, it uses volatile cache media, the information is reliable but volatile, the stored information disappears after power failure, and the information cannot be recovered after destruction, thus ensuring that the data information is not stolen or lost.
[0004] The objective of this invention is achieved through the following technical solutions.
[0005] A portable storage device capable of rapid data erasure and capacity expansion includes an interface body and capacity expansion modules. The interface body includes a T680 security chip, an RK3399 chip, a power supply battery, and a destruction switch. The T680 security chip connects to the host machine via an external interface for data transmission. The RK3399 chip connects to each capacity expansion module via an expansion interface for data transmission. The T680 security chip and the RK3399 chip are connected via an internal communication bus for data transmission. The power supply battery is connected to both the T680 security chip and the RK3399 chip via the destruction switch for power supply.
[0006] Furthermore, the T680 security chip is internally divided into an external interface, an interface identification module, an encryption / decryption module, an internal interface, and a storage flash. The external interface is used to realize the connection and data transmission between the T680 security chip and the host machine, and the internal interface is used to realize the connection and data transmission between the T680 security chip and the RK3399 chip.
[0007] The device is inserted into the host machine through the external interface. After the host machine initializes, it recognizes the device and loads the corresponding driver. The driver sends the host machine information to the interface recognition module. The interface recognition module matches the received host machine information with the host whitelist stored in flash. If the match is successful, the host machine and the device exchange data through the external interface. If the match fails, the connected external interface is interrupted.
[0008] On one hand, the encryption / decryption module receives data from the external interface, caches the received data, encrypts the cached data and adds a tag, and sends it to the RK3399 chip through the internal interface; on the other hand, the encryption / decryption module reads the data from the internal interface, decrypts the data according to the tag added during encryption, and after successful decryption, sends the data to the external interface.
[0009] Furthermore, the RK3399 chip is internally divided into an internal interface, a file system mapping module, and an expansion interface. The internal interface is used to transmit data with the T680 security chip via an internal communication bus. Each expansion interface is used to import or export data into its corresponding connected capacity expansion module. After the device is powered on, the file system mapping module traverses all capacity expansion modules through each expansion interface, calculates the total available memory, and formats the available memory of each capacity expansion module into a FAT32 file system.
[0010] Furthermore, each of the aforementioned capacity expansion modules uses a DDR chip.
[0011] Furthermore, the destruction switch cuts off the power supply to the battery, causing the information of each capacity expansion module to be lost, and the information will not be recovered after the power supply is restored, ensuring that the data will not be leaked.
[0012] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:
[0013] (1) The present invention can quickly clear data by quickly plugging and unplugging the interface body from the host machine. It can be separated from the host machine, and the information inside the device can be erased at any time.
[0014] (2) The capacity expansion module in this invention uses DDR chip and volatile cache medium. The information is reliable but volatile. The stored information disappears after power failure and cannot be recovered after the information is destroyed.
[0015] (3) The present invention is scalable. The capacity expansion module can be used to expand the capacity of the device according to the actual situation, which is convenient and flexible.
[0016] The modules designed using this invention have been applied to our company's products and equipment. In special circumstances, they can easily and quickly clear the information on the storage device, ensuring that the data information is not stolen or lost.
[0017] Instruction manual illustrations
[0018] Figure 1 This is a block diagram illustrating the implementation of the convenient storage device of the present invention, which enables rapid data erasure and capacity expansion.
[0019] Figure 2 This is a diagram of the internal framework of the T680 security chip in this invention.
[0020] Figure 3 This is a flowchart illustrating the workflow of connecting the portable storage device, which enables rapid data erasure and capacity expansion, to the host machine according to the present invention.
[0021] Figure 4 This is a flowchart illustrating the interface identification module of the T680 security chip in this invention.
[0022] Figure 5 This is a flowchart illustrating the encryption / decryption module of the T680 security chip in this invention.
[0023] Figure 6 This is a schematic diagram of the RK3399 chip in this invention.
[0024] Figure 7 This is a diagram of the external interface of the DDR chip in this invention. Detailed Implementation
[0025] The present invention will now be further described with reference to the accompanying drawings.
[0026] For security reasons, this invention proposes a convenient storage device that allows for rapid data erasure and capacity expansion, such as... Figure 1 As shown, the device consists of two parts: an interface main body and capacity expansion modules. The interface main body comprises a T680 security chip, an RK3399 chip, a power supply battery, and a destruction switch. The T680 security chip connects to the host machine for data transmission via external interfaces, including USB and SATA interfaces. The RK3399 chip connects to each capacity expansion module for data transmission via expansion interfaces, all of which are DDR storage capacity expansion interfaces. The T680 security chip and the RK3399 chip communicate via an internal communication bus. The power supply battery is connected to both the T680 security chip and the RK3399 chip via the destruction switch to provide power.
[0027] This invention uses the T680 security chip as the main control and communication chip. The T680 security chip can be selected from Fangcun Microelectronics' T680 as the interface chip for connection with the host machine. Figure 2 As shown, the T680 security chip can be internally divided into an external interface, an interface identification module, an encryption / decryption module, an internal interface, and flash memory. The external interface is used to establish the connection and data transmission between the T680 security chip and the host machine, while the internal interface is used to establish the connection and data transmission between the T680 security chip and the RK3399 chip. The T680 security chip internally needs to initialize interfaces such as USB and SATA, manage interface communication, control the reception and transmission of interface data, and encrypt the received host machine data before sending it to the RK3399 chip.
[0028] like Figure 3 and Figure 4 As shown, the device of the present invention is inserted into the host machine through the external interface. The host machine's controller is initialized, the host machine identifies the device, loads the corresponding driver, and the driver sends the host machine information to the interface identification module through the external interface. The interface identification module matches the received host machine information with the host whitelist stored in flash memory. If the match is successful, the host machine and the device can exchange data information normally through the external interface. If the match fails, the device will disconnect the connected external interface to prevent data leakage.
[0029] like Figure 5 As shown, the encryption / decryption module's workflow is as follows: On one hand, the encryption / decryption module receives data from the external interface, caches the received data (the cache size depends on the data volume and time), and when the cache reaches 64KB or the time window reaches 5ms, it encrypts the cached data, adds a tag, and sends it to the RK3399 chip through the internal interface. On the other hand, the encryption / decryption module reads data from the internal interface, decrypts the data according to the tags added during encryption, and after successful decryption, sends the data to the external interface, which in turn sends it to the host machine.
[0030] In this invention, the interface body can be selected from Rockchip Electronics' RK3399 chip as an internal interface expansion chip, used to connect various capacity expansion modules. For example... Figure 6As shown, the RK3399 chip is internally divided into an internal interface, a file system mapping module, and an expansion interface. The RK3399 chip needs to handle internal interface communication, expansion interface communication, and file system mapping. The internal interface is used for data transmission with the T680 security chip via an internal communication bus. Each expansion interface is used to import or export data into its corresponding connected capacity expansion module. After the device powers on, the file system mapping module traverses all capacity expansion modules through each expansion interface, calculates the total usable memory, and formats the available memory of each capacity expansion module into a FAT32 file system.
[0031] Each of the aforementioned capacity expansion modules can use DDR chips, specifically DDR3L SDRAM, such as the SCB13H8G802BF-13KI from Unisplendour Microelectronics. Its maximum operating frequency is 800MHz, and its chip architecture is 64M words x 16 bits x 8 banks. The information stored in the DDR chip will be lost after power failure. The DDR3L interface is as follows... Figure 7 As shown.
[0032] When the device of this invention is inserted into the host machine, it operates in normal working mode during data writing or writing. Once data transmission is complete, the device is unplugged and enters battery-powered mode, facilitating long-distance data transfer. The device includes an erase switch; pressing this switch cuts off power to the T680 security chip and RK3399 chip, thereby cutting off power to the DDR chips. After power failure, the information on the DDR chips is lost, and this information is not recovered upon power restoration, ensuring data security and preventing leakage.
[0033] Although the functions and working processes of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific functions and working processes described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these are within the protection scope of the present invention.
Claims
1. A portable storage device capable of rapid data erasure and capacity expansion, characterized in that, The system includes an interface body and a capacity expansion module. The interface body includes a T680 security chip, an RK3399 chip, a power supply battery, and a destruction switch. The T680 security chip connects to the host machine via an external interface for data transmission. The RK3399 chip connects to each capacity expansion module via an expansion interface for data transmission. The T680 security chip and the RK3399 chip are connected via an internal communication bus for data transmission. The power supply battery is connected to both the T680 security chip and the RK3399 chip via the destruction switch for power supply.
2. The portable storage device with rapid data erasure and capacity expansion according to claim 1, characterized in that, The T680 security chip is internally divided into an external interface, an interface identification module, an encryption / decryption module, an internal interface, and a storage flash. The external interface is used to realize the connection and data transmission between the T680 security chip and the host machine, and the internal interface is used to realize the connection and data transmission between the T680 security chip and the RK3399 chip. The device is inserted into the host machine through the external interface. After the host machine initializes, it recognizes the device and loads the corresponding driver. The driver sends the host machine information to the interface recognition module. The interface recognition module matches the received host machine information with the host whitelist stored in flash. If the match is successful, the host machine and the device exchange data through the external interface. If the match fails, the connected external interface is interrupted. On one hand, the encryption / decryption module receives data from the external interface, caches the received data, encrypts the cached data and adds a tag, and sends it to the RK3399 chip through the internal interface; on the other hand, the encryption / decryption module reads the data from the internal interface, decrypts the data according to the tag added during encryption, and after successful decryption, sends the data to the external interface.
3. The portable storage device with rapid data erasure and capacity expansion according to claim 1, characterized in that, The RK3399 chip is internally divided into an internal interface, a file system mapping module, and an expansion interface. The internal interface is used to transmit data with the T680 security chip via an internal communication bus. Each expansion interface is used to import or export data into its corresponding connected capacity expansion module. After the device is powered on, the file system mapping module traverses all capacity expansion modules through each expansion interface, calculates the total available memory, and formats the available memory of each capacity expansion module into a FAT32 file system.
4. The portable storage device with rapid data erasure and capacity expansion according to claim 1, characterized in that, All of the aforementioned capacity expansion modules use DDR chips.
5. The portable storage device with rapid data erasure and capacity expansion according to claim 1, characterized in that, The destruction switch cuts off the power supply to the battery, causing the information of each capacity expansion module to be lost. The information will not be recovered after the power supply is restored, ensuring that the data will not be leaked.