CN110766925B - Circuit and system for one-way remote transmission of keyboard and mouse signals - Google Patents
Circuit and system for one-way remote transmission of keyboard and mouse signals Download PDFInfo
- Publication number
- CN110766925B CN110766925B CN201811651377.8A CN201811651377A CN110766925B CN 110766925 B CN110766925 B CN 110766925B CN 201811651377 A CN201811651377 A CN 201811651377A CN 110766925 B CN110766925 B CN 110766925B
- Authority
- CN
- China
- Prior art keywords
- circuit
- keyboard
- mouse
- signal
- signals
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Abstract
The embodiment of the invention provides a circuit and a system for one-way remote transmission of keyboard and mouse signals, which are used for meeting the requirement of remote operation in emergency treatment. The circuit includes: the keyboard and mouse signal simulation circuit comprises a first signal plug, a first conversion circuit, a keyboard and mouse signal simulation circuit and a second signal plug; the first conversion circuit is used for converting keyboard and mouse signals received from the transfer host machine through the first signal plug into serial signals; the transfer host receives keyboard and mouse signals sent by emergency treatment personnel through the back-end host; the keyboard and mouse signal analog circuit is used for receiving serial signals through a signal receiving end of the keyboard and mouse signal analog circuit, decoding and converting the serial signals into keyboard control signals and mouse control signals, and sending the keyboard control signals and the mouse control signals to a target host through the second signal plug; the signal transmitting end of the keyboard and mouse signal analog circuit is suspended; wherein the target host and the transfer host are located on the site where the network security event occurs.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a circuit and a system for one-way remote transmission of keyboard and mouse signals.
Background
At present, network security events are frequent and distributed all over the country, experienced emergency response personnel are seriously insufficient, and the network security events are difficult to be disposed when arriving at the site at the first time of occurrence of the network security events.
Although the site can be monitored by remote video and handled by using a USB keyboard and mouse device, or the site can be monitored by remote video and handled by using a PS2 keyboard and mouse device, the USB keyboard and mouse protocol and the PS2 keyboard and mouse protocol can be transmitted in a direct transmission manner, that is, the USB cable and the PS2 are extended, but the extended transmission distance is far from meeting the requirement of remote operation in emergency.
When a network security incident occurs, emergency response personnel usually cannot perform remote emergency treatment by directly accessing the network where the network security incident occurs due to network breakdown in the field or to avoid infecting other equipment through the network by problematic equipment.
In summary, the current mode of transmitting keyboard and mouse signals through the USB protocol or the PS2 protocol cannot meet the requirement of remote operation in emergency.
Disclosure of Invention
The embodiment of the invention provides a circuit and a system for one-way remote transmission of keyboard and mouse signals, which are used for meeting the requirement of remote operation in emergency treatment.
Based on the above problem, the circuit for unidirectional remote transmission of keyboard and mouse signals provided by the embodiment of the present invention includes a first signal plug, a first conversion circuit, a keyboard and mouse signal analog circuit, and a second signal plug;
the first conversion circuit is used for converting keyboard and mouse signals received from the transfer host machine through the first signal plug into serial signals; the transfer host receives keyboard and mouse signals sent by emergency treatment personnel through the back-end host;
the keyboard and mouse signal analog circuit is used for receiving serial signals through a signal receiving end of the keyboard and mouse signal analog circuit, decoding and converting the serial signals into keyboard control signals and mouse control signals, and sending the keyboard control signals and the mouse control signals to a target host through the second signal plug; the signal transmitting end of the keyboard and mouse signal analog circuit is suspended;
wherein the target host and the transfer host are located on the site where the network security event occurs.
The system for unidirectional remote transmission of keyboard and mouse signals provided by the embodiment of the invention comprises the circuit for unidirectional remote transmission of keyboard and mouse signals provided by the embodiment of the invention and a transfer host.
The embodiment of the invention has the beneficial effects that:
in the circuit and system for unidirectional remote transmission of keyboard and mouse signals provided by the embodiments of the present invention, after the first conversion circuit converts the keyboard and mouse signals received from the relay host through the first signal plug into serial signals, the keyboard and mouse signal simulation circuit suspends the signal transmitting end, so that the keyboard and mouse signal simulation circuit only receives the serial signals, decodes and converts the serial signals into keyboard control signals and mouse control signals, and transmits the keyboard control signals and mouse control signals to the target host through the second signal plug, and does not transmit any signal to the relay host and the back-end host through the first conversion circuit and the first signal plug, thereby preventing the devices generating security events from infecting other devices through the network, and ensuring that the devices generating security events (i.e. the target host) can receive, transmit, or receive signals from the back-end host through the network, the relay host, The keyboard and mouse signals sent by the first signal plug, the first conversion circuit, the keyboard and mouse signal analog circuit and the second signal plug ensure that emergency response personnel can access a network to carry out remote emergency treatment on a safety event on the premise of avoiding equipment from being infected.
Drawings
Fig. 1 is a schematic structural diagram of a circuit for unidirectional remote transmission of keyboard and mouse signals according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a circuit for unidirectional remote transmission of keyboard and mouse signals according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a circuit for unidirectional remote transmission of keyboard and mouse signals according to an embodiment of the present invention.
Detailed Description
According to the circuit and the system for unidirectional remote transmission of the keyboard and mouse signals, after the first conversion circuit converts the keyboard and mouse signals received from the transfer host machine through the first signal plug into serial signals, the keyboard and mouse signal simulation circuit suspends the signal transmitting end, namely, a device (namely the transfer host machine) with a safety event cannot send any signal to the transfer host machine and the rear-end host machine through the keyboard and mouse signal simulation circuit, the first conversion circuit and the first signal plug, so that the device with the safety event is prevented from infecting other devices through a network; in addition, the keyboard and mouse signal simulation circuit receives serial signals only through the signal receiving end, decodes and converts the serial signals into keyboard control signals and mouse control signals, and sends the keyboard control signals and the mouse control signals to the target host through the second signal plug, so that the equipment (namely the target host) with the safety events can receive the keyboard and mouse signals sent by the back-end host through the network, the relay host, the first signal plug, the first conversion circuit, the keyboard and mouse signal simulation circuit and the second signal plug, and therefore emergency response personnel can be guaranteed to be connected into the network to carry out remote emergency handling on the safety events on the premise of avoiding the equipment from being infected.
The following describes a specific implementation of a circuit and a system for unidirectional remote transmission of keyboard and mouse signals according to an embodiment of the present invention with reference to the drawings of the specification.
The circuit for unidirectional remote transmission of keyboard and mouse signals provided by the embodiment of the invention, as shown in fig. 1, includes a first signal plug 11, a first conversion circuit 12, a keyboard and mouse signal analog circuit 13, and a second signal plug 14;
a first conversion circuit 12, for converting the keyboard and mouse signals received from the relay host 15 through the first signal plug 11 into serial signals; the relay host 15 receives keyboard and mouse signals sent by emergency treatment personnel through the back-end host 16;
the keyboard and mouse signal analog circuit 13 is used for receiving the serial signals through a signal receiving end of the keyboard and mouse signal analog circuit, decoding and converting the serial signals into keyboard control signals and mouse control signals, and sending the keyboard control signals and the mouse control signals to the target host 17 through a second signal plug 14; the signal transmitting end of the keyboard and mouse signal analog circuit 13 is suspended;
wherein the target host 17 and the transit host 15 are located at the site where the network security event occurs.
The keyboard and mouse signal analog circuit can be realized by a Micro Control Unit (MCU), and decodes the received serial signal by programming a specific firmware, and converts the serial signal into a corresponding keyboard control signal and a corresponding mouse control signal.
The first signal plug and the second signal plug may be Universal Serial Bus (USB) interfaces; the first signal plug 11 may also be a parallel interface, or other various types of network interfaces, wireless or bluetooth interfaces, and correspondingly, a portion of the first conversion circuit that performs signal transmission with the first signal plug also needs to be adjusted correspondingly according to the type of the interface; the second signal plug can also be a PS2 interface, and certainly, since it needs to transmit both keyboard control signals and mouse control signals, the second signal plug can be two PS2 interfaces; of course, the second signal plug may also be other interfaces capable of transmitting keyboard control signals and mouse control signals.
Further, in order to avoid the reverse transmission of the interference signal, that is, to avoid the interference signal from being transmitted from the target host side to the relay host side, the circuit for unidirectionally and remotely transmitting the keyboard and mouse signals according to the embodiment of the present invention, as shown in fig. 2, further includes an isolation circuit 18;
and the isolation circuit 18 is used for receiving the serial signals from the first converting circuit 12 and sending the received serial signals to the keyboard and mouse signal simulating circuit 13 in a coupling manner so as to prevent the interference signals on the target host side from being reversely transmitted to the relay host 15.
In practical implementation, the isolation circuit 18 may be an electromagnetic isolation circuit, an optical coupling isolation circuit, or another type of isolation circuit.
When the isolation circuit is an optical coupling isolation circuit, the input end of the optical coupling isolation circuit receives serial signals from the first conversion circuit, and the output end of the optical coupling isolation circuit is connected with the signal receiving end of the keyboard and mouse signal analog circuit; the optical coupling isolation circuit can ensure that the two isolated parts of the circuit are not directly electrically connected.
When the isolation circuit is an electromagnetic isolation circuit, the input end of the electromagnetic isolation circuit receives serial signals from the first conversion circuit, and the output end of the electromagnetic isolation circuit is connected with the signal receiving end of the keyboard and mouse signal analog circuit; wherein the ground signal at the input side of the electromagnetic isolation circuit is different from the ground signal at the output side of the electromagnetic isolation circuit. The input side and the output side of the electromagnetic isolation circuit are in different power supply loops and supply power independently, so that signal isolation can be realized on a physical layer, signals can be transmitted only in one direction, and various interference signals cannot be transmitted reversely through ground signals, so that the data safety is ensured fundamentally, and the possibility of data leakage of a target host is avoided.
Further, the circuit for unidirectional remote transmission of keyboard and mouse signals provided by the embodiment of the present invention, as shown in fig. 3, further includes a logging circuit 19;
and the log recording circuit 19 is used for recording the keyboard control signal output by the keyboard and mouse signal analog circuit.
That is, the keyboard and mouse signal simulation circuit analyzes the serial signal, recognizes the keyboard control signal and the mouse control signal, and transmits only the keyboard control signal to the log recording circuit, so that only the keyboard control signal is stored.
When the working levels of the keyboard and mouse signal analog circuit and the log recording circuit are not consistent, the log recording circuit comprises a level conversion circuit, a secure digital card reader and a secure digital card; the level conversion circuit provides proper working level for the secure digital card reader, and the secure digital card reader writes the received keyboard control signal into the secure digital card.
In a specific application scenario, the first signal plug and the second signal plug are both USB plugs, the first conversion circuit is a USB serial conversion circuit, the isolation circuit is an electromagnetic isolation circuit, in the circuit for unidirectional remote transmission of keyboard and mouse signals provided by the invention, the USB plug connected with the USB serial conversion circuit is the first signal plug, the USB serial conversion circuit converts keyboard and mouse signals received through the USB plug into serial signals, the serial signals are transmitted to the electromagnetic isolation circuit through a signal output TXD pin of the USB serial conversion circuit, the electromagnetic isolation circuit transmits the signals to a signal receiving end D0/RX of the keyboard and mouse signal analog circuit through electromagnetic coupling, a signal transmitting end D1/TX of the keyboard and mouse signal analog circuit is suspended, the keyboard and mouse signal analog circuit converts the received signals into keyboard control signals and mouse control signals through the second signal plug, i.e. another USB plug is transmitted to the target host. In the application scenario, the ground signal of the input side of the electromagnetic isolation circuit is the same as the ground signal of the USB serial conversion circuit and is UartGND, and the ground signal of the output side of the electromagnetic isolation circuit is the same as the ground signal of the keyboard and mouse signal analog circuit and is GND, so that the input side ground signal and the output side ground signal of the electromagnetic isolation circuit are isolated.
In another specific application scenario, the first signal plug and the second signal plug are both USB plugs, the first conversion circuit is a USB serial conversion circuit, the isolation circuit is an optical coupling isolation circuit, in the circuit for unidirectional remote transmission of keyboard and mouse signals provided by the present invention, the USB plug connected to the USB serial conversion circuit is the first signal plug, the USB serial conversion circuit converts keyboard and mouse signals received through the USB plug into serial signals, and transmits the serial signals to the optical coupling isolation circuit through its own signal output TXD pin, the optical coupling isolation circuit transmits signals to the signal receiving end D0/RX of the keyboard and mouse signal analog circuit through optical coupling, the signal transmitting end D1/TX of the keyboard and mouse signal analog circuit is suspended, the keyboard and mouse signal analog circuit converts the received signals into keyboard control signals and mouse control signals through the second signal plug, i.e. another USB plug is transmitted to the target host.
In the two application scenarios, a log recording circuit can be connected to an SCK pin (clock signal pin), an MOSI pin (serial data input pin), and a MISO pin (serial data output pin) of the keyboard and mouse signal simulation circuit, so as to record a keyboard control signal.
In addition, in the two application scenarios, the chip used by the keyboard and mouse signal analog circuit supports serial bidirectional communication, but in order to transmit the keyboard and mouse signals in a unidirectional manner, the transmitting line in the serial communication line is suspended, that is, the signal transmitting terminal in the keyboard and mouse signal analog circuit is suspended.
The system for unidirectional remote transmission of keyboard and mouse signals provided by the embodiment of the invention comprises the circuit for unidirectional remote transmission of keyboard and mouse signals provided by the embodiment of the invention and a transfer host.
Through the above description of the embodiments, those skilled in the art will clearly understand that the embodiments of the present invention can be implemented by means of hardware and necessary software. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods according to the embodiments of the present invention.
Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred embodiment and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.
Those skilled in the art will appreciate that the modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, and may be correspondingly changed in one or more devices different from the embodiments. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A circuit for unidirectional remote transmission of keyboard and mouse signals is characterized by comprising a first signal plug, a first conversion circuit, a keyboard and mouse signal analog circuit and a second signal plug;
the first conversion circuit is used for converting keyboard and mouse signals received from the transfer host machine through the first signal plug into serial signals; the transfer host receives keyboard and mouse signals sent by emergency treatment personnel through the back-end host;
the keyboard and mouse signal analog circuit is used for receiving serial signals through a signal receiving end of the keyboard and mouse signal analog circuit, decoding and converting the serial signals into keyboard control signals and mouse control signals, and sending the keyboard control signals and the mouse control signals to a target host through the second signal plug; the signal transmitting end of the keyboard and mouse signal analog circuit is suspended;
wherein the target host and the transfer host are located on the site where the network security event occurs.
2. The circuit of claim 1, wherein the circuit further comprises an isolation circuit;
the isolation circuit is used for receiving serial signals from the first conversion circuit and sending the received serial signals to the keyboard and mouse signal simulation circuit in a coupling mode so as to prevent interference signals on the target host computer side from being reversely transmitted to the transfer host computer.
3. The circuit of claim 2, wherein the isolation circuit is an electromagnetic isolation circuit, an input terminal of the electromagnetic isolation circuit receives serial signals from the first conversion circuit, and an output terminal of the electromagnetic isolation circuit is connected to a signal receiving terminal of the keyboard and mouse signal simulation circuit; wherein a ground signal on an input side of the electromagnetic isolation circuit is different from a ground signal on an output side of the electromagnetic isolation circuit.
4. The circuit of claim 2, wherein the isolation circuit is an optical coupling isolation circuit, an input end of the optical coupling isolation circuit receives serial signals from the first conversion circuit, and an output end of the optical coupling isolation circuit is connected with a signal receiving end of the keyboard and mouse signal analog circuit.
5. The circuit of claim 1, wherein the circuitry for unidirectional remote transmission of keyboard-mouse signals further comprises logging circuitry;
and the log recording circuit is used for recording the keyboard control signal output by the keyboard and mouse signal simulation circuit.
6. The circuit of claim 5, wherein the logging circuit comprises a level conversion circuit, a secure digital card reader, and a secure digital card.
7. A system for unidirectional remote transmission of keyboard and mouse signals, which comprises the circuit for unidirectional remote transmission of keyboard and mouse signals of any one of claims 1 to 6 and a relay host.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811651377.8A CN110766925B (en) | 2018-12-31 | 2018-12-31 | Circuit and system for one-way remote transmission of keyboard and mouse signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811651377.8A CN110766925B (en) | 2018-12-31 | 2018-12-31 | Circuit and system for one-way remote transmission of keyboard and mouse signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110766925A CN110766925A (en) | 2020-02-07 |
| CN110766925B true CN110766925B (en) | 2020-09-29 |
Family
ID=69328487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811651377.8A Active CN110766925B (en) | 2018-12-31 | 2018-12-31 | Circuit and system for one-way remote transmission of keyboard and mouse signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110766925B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111475867A (en) * | 2020-04-03 | 2020-07-31 | 刘小明 | General safety cooperation system |
| CN114035697B (en) * | 2021-11-26 | 2023-10-03 | 中国电子技术标准化研究院 | Low-radiation anti-electromagnetic-interference keyboard and mouse simulation device and method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10177692A (en) * | 1996-12-17 | 1998-06-30 | Atsumi Electron Corp Ltd | Line receiving device |
| CN1763621A (en) * | 2005-08-26 | 2006-04-26 | 清华大学 | USB-optical beam transfer device for serial communication |
| CN101150636A (en) * | 2006-09-21 | 2008-03-26 | 德赛电子(惠州)有限公司 | An integrated information terminal construction method and device |
| CN101369150A (en) * | 2008-09-28 | 2009-02-18 | 中山华帝燃具股份有限公司 | Kitchen control system and its operation method |
| CN101444034A (en) * | 2004-12-07 | 2009-05-27 | 克斯特无线电公司 | Device and method for selectively controlling the utility of a taget |
| CN101459608A (en) * | 2008-12-08 | 2009-06-17 | 上海华平信息技术股份有限公司 | Resource sharing method for internal and external network |
| WO2014101321A1 (en) * | 2012-12-26 | 2014-07-03 | 上海无线通信研究中心 | Network-based communication control apparatus, electrical device, and network control method thereof |
| CN104270356A (en) * | 2014-09-24 | 2015-01-07 | 国家电网公司 | Intelligent server safety control terminal and server monitoring method |
| CN104503594A (en) * | 2014-12-16 | 2015-04-08 | 中国科学院长春光学精密机械与物理研究所 | PS/2 keyboard-mouse remote switching system |
| CN104767079A (en) * | 2015-04-30 | 2015-07-08 | 小鸟科技有限公司 | Cable coupler component |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2268273Y (en) * | 1996-08-28 | 1997-11-19 | 曾浩 | Radio-frequency wireless mouse device |
| CN2335186Y (en) * | 1997-02-28 | 1999-08-25 | 昆盈企业股份有限公司 | Computer input device with mode converting function |
| CN1210528C (en) * | 2002-09-13 | 2005-07-13 | 珠海格力电器股份有限公司 | Air-conditioner voice phone monitoring system |
| CN1598795A (en) * | 2003-12-23 | 2005-03-23 | 沈攀峰 | Computer long-distance controller |
| CN2739698Y (en) * | 2004-09-14 | 2005-11-09 | 威芯科技股份有限公司 | Portable network type keyboard/screen/mouse adapting device |
| US7509402B2 (en) * | 2006-03-16 | 2009-03-24 | Exceptional Innovation, Llc | Automation control system having a configuration tool and two-way ethernet communication for web service messaging, discovery, description, and eventing that is controllable with a touch-screen display |
| CN201145896Y (en) * | 2007-12-06 | 2008-11-05 | 徐震 | USB interface insulation converter |
| CN105205419A (en) * | 2014-06-18 | 2015-12-30 | 山东中孚信息产业股份有限公司 | Method for achieving unidirectional transmission of keyboard and mouse |
| CN104503822A (en) * | 2014-12-16 | 2015-04-08 | 中国科学院长春光学精密机械与物理研究所 | PS/2 keyboard and mouse simulator |
| CN205038637U (en) * | 2015-10-15 | 2016-02-17 | 洛阳银杏科技有限公司 | RS232 and RS485422 interface converter based on microprocessor |
-
2018
- 2018-12-31 CN CN201811651377.8A patent/CN110766925B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10177692A (en) * | 1996-12-17 | 1998-06-30 | Atsumi Electron Corp Ltd | Line receiving device |
| CN101444034A (en) * | 2004-12-07 | 2009-05-27 | 克斯特无线电公司 | Device and method for selectively controlling the utility of a taget |
| CN1763621A (en) * | 2005-08-26 | 2006-04-26 | 清华大学 | USB-optical beam transfer device for serial communication |
| CN101150636A (en) * | 2006-09-21 | 2008-03-26 | 德赛电子(惠州)有限公司 | An integrated information terminal construction method and device |
| CN101369150A (en) * | 2008-09-28 | 2009-02-18 | 中山华帝燃具股份有限公司 | Kitchen control system and its operation method |
| CN101459608A (en) * | 2008-12-08 | 2009-06-17 | 上海华平信息技术股份有限公司 | Resource sharing method for internal and external network |
| WO2014101321A1 (en) * | 2012-12-26 | 2014-07-03 | 上海无线通信研究中心 | Network-based communication control apparatus, electrical device, and network control method thereof |
| CN104270356A (en) * | 2014-09-24 | 2015-01-07 | 国家电网公司 | Intelligent server safety control terminal and server monitoring method |
| CN104503594A (en) * | 2014-12-16 | 2015-04-08 | 中国科学院长春光学精密机械与物理研究所 | PS/2 keyboard-mouse remote switching system |
| CN104767079A (en) * | 2015-04-30 | 2015-07-08 | 小鸟科技有限公司 | Cable coupler component |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110766925A (en) | 2020-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101237280B (en) | Device and method for out-of-band signaling over optical cable | |
| US7673092B2 (en) | PCI Express interface | |
| US10261930B2 (en) | System, device and method for transmitting signals between different communication interfaces | |
| CN109558371B (en) | Method for communicating with a microcontroller, and computing system | |
| CN110766925B (en) | Circuit and system for one-way remote transmission of keyboard and mouse signals | |
| Su et al. | {USB} snooping made easy: crosstalk leakage attacks on {USB} hubs | |
| US20150002296A1 (en) | Connector identification through proximity sensing | |
| CN106970886A (en) | The physical link of the first agreement is controlled using the expanded function structure of second protocol | |
| US9654342B2 (en) | Bandwidth configurable IO connector | |
| CN102160044A (en) | Sata mass storage device emulation on pcie interface | |
| US9396149B2 (en) | PCIE switch apparatus and method of controlling connection thereof | |
| CN110794971B (en) | Remote control equipment and system | |
| TW200703011A (en) | Bus device used in computer system | |
| TW201349794A (en) | Multi-computers network sharing system having plug-and-play interfaces | |
| CN102073611A (en) | I2C bus control system and method | |
| CN104380274B (en) | Apparatus and method for the link training and management of optimization | |
| US20120102251A1 (en) | Serial attached small computer system interface (sas) domain access through a universal serial bus interface of a data processing device | |
| US20230195671A1 (en) | Storage enclosure and system including the storage enclosure | |
| KR20090009512A (en) | Serial ata electronic device and test method for the serial ata electronic device | |
| CN206584350U (en) | A kind of one-way transmission component based on visible ray | |
| KR20160147373A (en) | Sata host bus adaptor using light signal and method for connecting sata storage using the same | |
| CN205302280U (en) | One -way transmission device | |
| CN102004619B (en) | Method for transmitting data to printer of USB interface in single direction | |
| TWI598739B (en) | Hard disc expanding device | |
| CN111611181A (en) | HID and CDROM composite USB simulation equipment based on wide area network without BIOS and IPMI support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |