CN113344163A - Mobile memory and method for realizing one-way data transmission based on NFC - Google Patents
Mobile memory and method for realizing one-way data transmission based on NFC Download PDFInfo
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- CN113344163A CN113344163A CN202110563725.1A CN202110563725A CN113344163A CN 113344163 A CN113344163 A CN 113344163A CN 202110563725 A CN202110563725 A CN 202110563725A CN 113344163 A CN113344163 A CN 113344163A
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- 238000012546 transfer Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/073—Special arrangements for circuits, e.g. for protecting identification code in memory
- G06K19/07309—Means for preventing undesired reading or writing from or onto record carriers
- G06K19/07345—Means for preventing undesired reading or writing from or onto record carriers by activating or deactivating at least a part of the circuit on the record carrier, e.g. ON/OFF switches
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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Abstract
The invention discloses a mobile memory for realizing unidirectional data transmission based on NFC, which is used for realizing the unidirectional data transmission between different computer terminals or between intranet and extranet terminals safely, and is provided with an NFC module, and an NFC label is arranged at the interface of the mobile memory of a preset computer; adopting an NFC module to authenticate the computer, and controlling the read-write state of a storage carrier in the removable memory according to the result of the NFC authentication: if the computer is a predetermined computer which passes the authentication, the storage carrier in the removable memory is in a readable and writable state, otherwise, the storage carrier in the removable memory is in a read-only state, so that the information safety of the intranet computer and the specific computer can be really ensured, the external transmission of internal data is not hindered, and the purpose of data safety transmission is realized.
Description
Technical Field
The invention relates to a mobile memory and a method for realizing unidirectional data transmission based on NFC, in particular to a mobile memory and a method for safely and unidirectionally transmitting data between different computer terminals or between intranet and extranet terminals.
Background
The applicant/inventor of the present application respectively describes a removable memory and a method for unidirectional data transmission, a memory and a method for data secure transmission based on a proximity switch in the invention patent applications with application numbers CN2021101022830 and CN2021102699788, and the present invention patent application is a further improvement made on the basis of the above invention patent. The applicant of the present patent application reserves the right to fully incorporate the entire contents of the invention patent of the above-mentioned prior application with respect to the contents of the technical solution of the present application, and for the sake of brevity, it is not described in a great deal in the specification of the present application.
In application number CN2021101022830, we adopt the following technical scheme:
a kind of unidirectional data transmission removable memory, including the storage carrier used for storing the data, unidirectional data transmission controller; the unidirectional data transmission controller is also provided with a control end, and the control end is a physical manual input end and does not receive any program instruction; the unidirectional data transfer controller is used for controlling the data flow direction of the storage carrier, so that: the data stored in the predetermined computer can be transmitted only to any computer other than the predetermined computer by taking the removable memory for unidirectional data transmission as a medium; and the data stored in any computer except the predetermined computer can not be transmitted to the predetermined computer by taking the removable memory with unidirectional data transmission as a medium; the control end of the unidirectional data transmission controller is a physical manual input end and does not receive any program instruction, so that the working state of the switch of the unidirectional data transmission controller is not controlled by any program instruction and can be controlled only by the manual input end.
In application number CN2021102699788, we adopt the following technical scheme:
a removable memory for secure transfer of data based on a proximity switch, characterized by: the device comprises a storage carrier for storing data, a unidirectional data transmission controller; the unidirectional data transmission controller is used for controlling the data flow direction of the storage carrier; the unidirectional data transmission controller is provided with a proximity switch, and the predetermined computer is provided with a proximity control part matched with the proximity switch;
the proximity switch is connected in series on a data line for writing data such that: when the removable memory is connected to a predetermined computer, the switch of the unidirectional data transmission controller is in a low-resistance or conducting state, and the predetermined computer can write data into the carrier; when the removable memory is connected to any computer other than the predetermined computer, the proximity switch of the unidirectional data transfer controller is in a high impedance or off state, and any computer other than the predetermined computer cannot write data into the carrier.
The proximity switch is a magnetic proximity switch, an inductive proximity switch, a photoelectric proximity switch, a capacitive proximity switch, a Hall proximity switch, an ultrasonic proximity switch or a microwave proximity switch.
The technical scheme with the application number of CN2021101022830 has certain defects, namely: (1) the operation is somewhat complicated, and the operator needs to manually operate the manual input end to enable the preset computer to write data into the storage carrier of the removable memory; (2) when used in an extranet computer, there is still a human safety risk if an operator inadvertently misoperates the manual input of the removable memory.
The technical solution with application number CN2021102699788 also has certain disadvantages, namely: the proximity switches are magnetic proximity switches, inductive proximity switches, photoelectric proximity switches, capacitive proximity switches, hall proximity switches or ultrasonic proximity switches, lack of verification mechanisms and are easily interfered, misled or intentionally prevented, for example, the magnetic proximity switches and the hall proximity switches are easily interfered by close magnets to cause misoperation, and the movable memory is changed into a readable and writable state under the condition of read-only. For another example, the ultrasonic proximity switch is easily interfered by external noise, resulting in a false turning over of the working state, not to mention the worry of the people. Namely, the technical scheme can only prevent the gentleman and can not prevent the kids, only realizes the unidirectional data transmission possibility on the technical level, and points out a direction for data safety.
In order to solve the existing defects, the need for improvement is continued.
Disclosure of Invention
The invention provides a memory and a method for realizing unidirectional data transmission based on NFC, aiming at safely and unidirectionally transmitting data between different computer terminals or between intranet and extranet terminals and preventing intentional defense breach of a conscious person.
In order to realize the safe unidirectional data transmission between different computer terminals or between intranet and extranet terminals, the invention provides a removable memory, which adopts an NFC module to authenticate a computer and controls the read-write state of a storage carrier in the removable memory according to the result of the NFC authentication: if the computer is a predetermined computer which passes the authentication, the storage carrier in the removable memory is in a readable and writable state, otherwise the storage carrier in the removable memory is in a read-only state.
The removable memory comprises a storage carrier for storing data, a main control chip and an NFC module (Near Field Communication, NFC for short), wherein the main control chip comprises a unidirectional data transmission controller; the unidirectional data transmission controller is used for controlling the state of a data line of the storage carrier for writing data; the data line for writing data is provided with an electronic switch, the NFC module is connected with a unidirectional data transmission controller in a main control chip, and an NFC label matched with the NFC module is arranged at a movable memory interface of a preset computer;
the electronic switch is connected in series on a data line for writing data such that:
when the removable memory is connected to a predetermined computer, the electronic switch is in a low-resistance or conducting state, and the predetermined computer is capable of writing data into the carrier;
when the removable memory is connected to any computer other than the intended computer, the electronic switch is in a high impedance or off state and no data can be written into the carrier by any computer other than the intended computer.
In specific implementation, when the removable memory is inserted into a removable memory interface of a predetermined computer, the NFC module and the NFC tag arranged at the removable memory interface of the predetermined computer are close to each other, and perform data exchange to complete device identification, the NFC module of the removable memory enables an electronic switch of a data line for writing data to be in a conducting or low-resistance state through a unidirectional data transmission controller, and the predetermined computer can write data into a carrier;
when the removable memory is inserted into any computer except the predetermined computer, the computer can not complete the device identification due to the lack of the NFC tag matched with the NFC module in the removable memory, the NFC module of the removable memory enables the electronic switch of the data line for writing data to be in a high-impedance or cut-off state through the unidirectional data transmission controller, and any computer except the predetermined computer can not write data into the carrier but can read binary information in the removable memory.
Because the NFC technology has the characteristic of short communication distance, the accident of error identification can be avoided.
The electronic switch can adopt a transmission gate circuit (TG circuit) with a CMOS structure.
Based on the design, the data on the predetermined computer can be safely propagated to the computers of the external network.
In the present invention, the meaning of "movable" is that well known in the art; the terms "high resistance" and "low resistance" are used in the well-known electronic or computer field, and the data is any binary information that can be read by a computer in a broad sense.
The inventor has elaborated the working principle, technical scheme and technical effect of the invention.
For details which are not described in detail in the present invention, reference may be made to CN2021101022830 and CN 2021102699788. For the sake of brevity, no relevant content is repeated in this application, and the technical content of CN2021101022830 and CN2021102699788 is considered part of the description of the present invention.
Compared with the prior various technologies, the invention not only has the following outstanding advantages and positive effects of the prior invention patent application:
through the special removable memory provided by the invention, the data information in the intranet computer and the specific computer which need to be protected can only be copied, and any binary data of any external computer, no matter the data is pure data without an execution function, cannot be transferred to the special removable memory provided by the invention, because the removable memory is in a read-only state, viruses and trojans cannot be spread to the intranet computer and the specific computer which need to be protected. Through the specially designed mobile memory for unidirectional data transmission and the unidirectional data transmission method, in the technical scheme, the intranet computer and the specific computer are physically isolated from any external computer and cannot directly transmit data, the information safety of the intranet computer and the specific computer can be really ensured, the external transmission of internal data is not hindered, and the purpose of data safe transmission is realized.
The predetermined computers referred to herein are typically intranet computers, security-related computers, computers for laboratory instruments, computers in private networks, industrial control computers, and the like, and these computers need to be strictly physically isolated from outside networks. So-calledHarmful binary information, typically viruses, trojans, malicious programs, etc。
Compared with the prior invention patent application, the invention also has the following outstanding advantages and positive effects:
(1) the use is more convenient, the user does not need to manually operate a manual input end every time, and the proximity control part of the preset computer can enable the proximity switch of the removable memory to automatically switch the working mode, so that the removable memory is automatically switched between a readable/writable state (Read/Write) and a Read-only state (Read-only); (2) when the mobile memory is used in an external network computer, the safety risk caused by the fact that an operator carelessly and mistakenly operates the manual input end of the mobile memory is avoided.
The inventor has elaborated the working principle, technical scheme and technical effect of the invention. Those skilled in the art will appreciate that the detailed description herein is not a prior art, and should not be construed as an exhaustive disclosure of the invention.
Drawings
FIG. 1: schematic of embodiment 1.
FIG. 2: schematic of embodiment 2.
FIG. 3: schematic of embodiment 3.
Detailed Description
The technical scheme of the invention is specifically described by combining the examples.
Embodiment mode 1:
the equipment using the NFC technology can exchange data under the condition of being close to each other, is integrated and evolved by a non-contact Radio Frequency Identification (RFID) and an interconnection and intercommunication technology, integrates the functions of an induction type card reader, an induction type card and point-to-point communication on a single chip E, and utilizes the mobile terminal to realize the applications of mobile payment, electronic ticketing, entrance guard, mobile identity identification, anti-counterfeiting and the like. The NFC (near field communication service) combines the near field communication technology and the mobile communication technology, and realizes multiple functions of electronic payment, identity authentication, ticketing, data exchange, anti-counterfeiting, advertisement and the like.
As shown in fig. 1, a removable memory includes a Flash storage carrier for storing binary data, a main control chip, and an NFC module, where the main control chip includes a unidirectional data transmission controller; the unidirectional data transmission controller is used for controlling the state of a data line of the storage carrier for reading and writing data; the NFC module is connected with a one-way data transmission controller in the main control chip, and an NFC label matched with the NFC module is arranged at a removable memory interface of the preset computer. Naturally, the removable memory has, without exception, an interface for plugging into a removable memory interface of the computer.
In the technical scheme, an intranet computer and a specific computer are physically isolated from any external computer and cannot directly transmit data, the information safety of the intranet computer and the specific computer can be really ensured, external transmission of internal data is not hindered, and the purpose of unidirectional data transmission is realized.
In a specific implementation:
when the movable memory is inserted into a movable memory interface of a preset computer, the NFC module and the NFC tag are close to each other, data exchange is carried out between the NFC module and the NFC tag, and equipment identification is completed;
when the removable memory is inserted into any computer except a preset computer, the computer lacks an NFC label matched with an NFC module in the removable memory and cannot complete equipment identification, the NFC module of the removable memory controls the state of a data line for reading and writing data through the unidirectional data transmission controller, so that the Flash storage carrier is in a read-only state, and the computer cannot write data into the carrier but can read binary information in the removable memory.
Because only computers which are authorized in advance have matched NFC labels, the NFC labels have the function of identity recognition, and misoperation and intentional damage of operators are avoided, so that one-way data transmission between different computer terminals or between intranet and extranet terminals can be ensured, and the system is simpler and more convenient to use, and is safer and more reliable.
Embodiment mode 2:
a kind of removable memory, the said removable memory includes Flash memory carrier, top management chip, NFC module used for storing the binary data, the said top management chip includes the unidirectional data transmission controller; the unidirectional data transmission controller is used for controlling the state of a data line of the storage carrier for reading and writing data; the NFC module is connected with a one-way data transmission controller in the main control chip, and an NFC label matched with the NFC module is arranged at a removable memory interface of the preset computer. The removable memory has an interface for insertion into a removable memory interface of the computer.
This embodiment mode 2 is similar to embodiment mode 1. Further disclosed is:
the removable memory also has data lines for reading data and data lines for writing data, the unidirectional data transmission controller is used for controlling the state of the data lines for writing data of the storage carrier; the data lines for writing data have electronic switches as shown in fig. 2. Since the basic principle is similar to that of embodiment 1, components such as an NFC module, an NFC tag, and a host chip are not depicted in fig. 2. The state of the electronic switch is controlled by the NFC module. When the electronic switch is in a conducting state or a low-resistance state, the Hash storage carrier is in a readable and writable state; when the electronic switch is in a high-resistance or cut-off state, the Flash storage carrier is in a read-only state.
In specific implementation, when the removable memory is inserted into a removable memory interface of a predetermined computer, the NFC module and the NFC tag arranged at the removable memory interface of the predetermined computer are close to each other, and perform data exchange to complete device identification, the NFC module of the removable memory enables an electronic switch of a data line for writing data to be in a conducting or low-resistance state through a unidirectional data transmission controller, and the predetermined computer can write data into a carrier;
when the removable memory is inserted into any computer except the predetermined computer, the computer can not complete the device identification due to the lack of the NFC tag matched with the NFC module in the removable memory, the NFC module of the removable memory enables the electronic switch of the data line for writing data to be in a high-impedance or cut-off state through the unidirectional data transmission controller, and any computer except the predetermined computer can not write data into the carrier but can read binary information in the removable memory.
Based on the design, the data on the predetermined computer can be safely propagated to the computers of the external network.
Embodiment mode 3:
this embodiment mode 3 is similar to embodiment mode 1. Further disclosed is:
the removable memory also has data lines for reading and writing data, the unidirectional data transfer controller is used for controlling the state of the data lines for reading and writing data of the storage carrier; namely: the data lines here have both a function of reading data and a function of writing data, i.e. the same data line has a multiplexing function. The data line for reading and writing data is divided into a sub data line for reading data and a sub data line for writing data after passing through the unidirectional data transmission controller. The sub data lines for writing data have electronic switches as shown in fig. 3.
In particular, the carrier of the removable memory has data lines for reading or writing data (Read/Write), the data lines being located between an external interface of the removable memory and the carrier for storing data, a unidirectional data transfer controller being connected in series to the data lines for reading or writing data (Read/Write), the unidirectional data transfer controller being adapted to control the carrier to be in a readable/writable state (Read/Write) or a Read-only state (Read-only).
Since the basic principle is similar to that of embodiment 1, components such as an NFC module, an NFC tag, and a host chip are not depicted in fig. 3. The state of the electronic switch is controlled by the NFC module. When the electronic switch is in a conducting state or a low-resistance state, the Flash storage carrier is in a readable and writable state; when the electronic switch is in a high-resistance or cut-off state, the Flash storage carrier is in a read-only state.
In specific implementation, when the removable memory is inserted into a removable memory interface of a predetermined computer, the NFC module and the NFC tag arranged at the removable memory interface of the predetermined computer are close to each other, and perform data exchange to complete device identification, the NFC module of the removable memory enables an electronic switch of a data line for writing data to be in a conducting or low-resistance state through a unidirectional data transmission controller, and the predetermined computer can write data into a carrier;
when the removable memory is inserted into any computer except the predetermined computer, the computer can not complete the device identification due to the lack of the NFC tag matched with the NFC module in the removable memory, the NFC module of the removable memory enables the electronic switch of the data line for writing data to be in a high-impedance or cut-off state through the unidirectional data transmission controller, and any computer except the predetermined computer can not write data into the carrier but can read binary information in the removable memory.
In all embodiments, when the removable memory is inserted into the computer, the power supply is available from the computer through the interface.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A removable memory for one-way data transfer based on NFC implementation, characterized in that: in order to realize the safe unidirectional data transmission between different computer terminals or between intranet and extranet terminals, the movable memory is provided with an NFC module, and an NFC label is arranged at the interface of the movable memory of a preset computer; adopting an NFC module to authenticate the computer, and controlling the read-write state of a storage carrier in the removable memory according to the result of the NFC authentication: if the computer is a predetermined computer which passes the authentication, the storage carrier in the removable memory is in a readable and writable state, otherwise the storage carrier in the removable memory is in a read-only state.
2. The removable memory of claim 1, wherein: the removable memory comprises a storage carrier for storing data, a main control chip and an NFC module (Near Field Communication, NFC for short), wherein the main control chip comprises a unidirectional data transmission controller; the unidirectional data transmission controller is used for controlling the state of a data line of the storage carrier for writing data; the data line for writing data is provided with an electronic switch, the NFC module is connected with the unidirectional data transmission controller in the main control chip, and an NFC label matched with the NFC module is arranged at a movable memory interface of the preset computer.
3. The removable memory of claim 2, wherein: the electronic switch is connected in series on a data line for writing data such that:
when the removable memory is connected to a predetermined computer, the electronic switch is in a low-resistance or conducting state, and the predetermined computer is capable of writing data into the carrier;
when the removable memory is connected to any computer other than the intended computer, the electronic switch is in a high impedance or off state and no data can be written into the carrier by any computer other than the intended computer.
4. The removable memory of claim 1, wherein: the removable memory has data lines for reading and writing data, the unidirectional data transmission controller is used for controlling the state of the data lines for reading and writing data of the storage carrier; namely: the data line has both a function of reading data and a function of writing data; the data line for reading and writing data is divided into a subdata line for reading data and a subdata line for writing data after passing through the unidirectional data transmission controller, the subdata line for writing data is provided with an electronic switch, and the electronic switch is controlled by the NFC module.
5. The removable memory of claim 4, wherein: when the removable memory is inserted into a removable memory interface of a preset computer, the NFC module exchanges data with the NFC label to complete equipment identification, the NFC module of the removable memory enables an electronic switch of a data line for writing data to be in a conducting or low-resistance state through a one-way data transmission controller, and the preset computer can write data into a carrier;
when the removable memory is inserted into any computer except the predetermined computer, the NFC module cannot complete device identification, the NFC module enables the electronic switch of the data line for writing data to be in a high-impedance or cut-off state, and any computer except the predetermined computer cannot write data into the carrier but can read binary information in the removable memory.
6. The removable memory of claim 1, wherein: the movable memory comprises a storage carrier for storing binary data, a main control chip and an NFC module, wherein the main control chip comprises a unidirectional data transmission controller; the unidirectional data transmission controller is used for controlling the state of a data line of the storage carrier for reading and writing data; the NFC module is connected with a one-way data transmission controller in the main control chip, and an NFC label matched with the NFC module is arranged at a removable memory interface of the preset computer.
7. The removable memory of claim 6, wherein: when the removable memory is inserted into a removable memory interface of a preset computer, the NFC module exchanges data with the NFC tag to complete equipment identification, the NFC module controls the state of a data line for reading and writing data through the unidirectional data transmission controller, so that the storage carrier is in a readable and writable state, and the preset computer can write data into the storage carrier;
when the removable memory is inserted into any computer except the predetermined computer, the NFC module controls the state of the data lines for reading and writing data through the unidirectional data transmission controller, so that the storage carrier is in a read-only state, and the computer cannot write data into the carrier but can read binary information in the removable memory.
8. The removable memory of claim 1, wherein: the mobile memory comprises a storage carrier, a main control chip and an NFC module, wherein the main control chip comprises a unidirectional data transmission controller; the unidirectional data transmission controller is used for controlling the state of a data line of the storage carrier for reading and writing data; the NFC module is connected with a unidirectional data transmission controller in the main control chip, and an NFC label matched with the NFC module is arranged at a movable memory interface of a preset computer; the removable memory has an interface for insertion into a removable memory interface of the computer.
9. The removable memory of claim 8, wherein: the removable memory also has data lines for reading data and data lines for writing data, the unidirectional data transmission controller is used for controlling the state of the data lines for writing data of the storage carrier; the data line for writing data is provided with an electronic switch, and the state of the electronic switch is controlled by the NFC module; when the electronic switch is in a conducting state or a low-resistance state, the storage carrier is in a readable and writable state; when the electronic switch is in a high resistance or off state, the storage carrier is in a read-only state.
10. The removable memory of claim 9, wherein: when the removable memory is inserted into a removable memory interface of a preset computer, the NFC module exchanges data with the NFC label to complete equipment identification, the electronic switch is in a conducting or low-resistance state through the NFC module, and the preset computer can write data into the carrier;
when the removable memory is inserted into any computer except the predetermined computer, the device identification cannot be completed, the NFC module enables the electronic switch to be in a high-impedance or cut-off state, and any computer except the predetermined computer cannot write data into the carrier but can read binary information in the removable memory.
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| CN202110563725.1A CN113344163A (en) | 2021-05-24 | 2021-05-24 | Mobile memory and method for realizing one-way data transmission based on NFC |
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| CN202110563725.1A CN113344163A (en) | 2021-05-24 | 2021-05-24 | Mobile memory and method for realizing one-way data transmission based on NFC |
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