CN214591472U - Portable quantum random number generating device - Google Patents
Portable quantum random number generating device Download PDFInfo
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- CN214591472U CN214591472U CN202121020102.1U CN202121020102U CN214591472U CN 214591472 U CN214591472 U CN 214591472U CN 202121020102 U CN202121020102 U CN 202121020102U CN 214591472 U CN214591472 U CN 214591472U
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Abstract
The utility model provides a portable quantum random number generating device, which comprises a quantum random number chip, a singlechip, a power management chip and at least two USB interfaces; the quantum random number chip is connected with the single chip microcomputer, the quantum random number chip performs unidirectional data transmission to the single chip microcomputer, and the quantum random number chip is used for generating quantum random numbers; the singlechip is connected with each USB interface and carries out bidirectional data transmission; each USB interface is respectively and simultaneously connected with different equipment to share quantum random numbers for each equipment; the singlechip is used for acquiring the quantum random number and sending the quantum random number to the equipment through the USB interface; the power management chip is respectively connected with the quantum random number chip and the single chip microcomputer and supplies power to the quantum random number chip and the single chip microcomputer. The utility model discloses well portable quantum random number generating device is equipped with 2 or the USB interface more than 2, can be simultaneously to many external device transmission quantum random number, uses as the symmetric key in the encryption communication.
Description
Technical Field
The utility model relates to an integrated circuit design technical field, concretely relates to portable quantum random number generating device.
Background
Many of the modern cryptographic algorithm theories rely heavily on the randomness of random numbers. Computers without true random number generators generally generate pseudo-random numbers by random function software, and the randomness of the pseudo-random numbers is difficult to be fundamentally guaranteed. Computer systems that employ pseudorandom numbers for cryptographic operations are therefore also more vulnerable to security threats.
The hardware of the current true random number generator mainly uses a circuit physical entropy source to ensure randomness, for example, patents with publication numbers of CN112363688A, CN111782179A and CN112015368A sample by a ring oscillator clock; the scheme of adopting a programmable logic gate array (FPGA) is also adopted in patents with publication numbers of CN111538475A and CN 111949242A; however, they are relatively large in size, relatively inefficient in random number generation, difficult to directly connect and use with a computer, and still prone to loss of randomness when subjected to a bypass attack by an externally applied electromagnetic field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a portable quantum random number generator aiming at the prior art, which is characterized in that the portable quantum random number generator comprises a quantum random number chip, a singlechip, a power management chip and at least two USB interfaces;
the quantum random number chip is connected with the single chip microcomputer, the quantum random number chip performs unidirectional data transmission to the single chip microcomputer, and the quantum random number chip is used for generating a quantum random number;
the USB interface comprises an interface data pin and an interface power supply pin, and the single chip microcomputer is connected with the interface power supply pins of the USB interfaces and performs bidirectional data transmission; the interface power supply pin is connected with the power management chip; the USB interfaces are respectively and simultaneously connected with different devices, and the quantum random numbers are shared by the devices;
the single chip microcomputer is used for acquiring the quantum random number and sending the quantum random number to the equipment through the USB interface;
and the power management chip is respectively connected with the quantum random number chip and the singlechip and supplies power to the quantum random number chip and the singlechip.
Furthermore, the connection structure of the single chip microcomputer and the quantum random number chip is provided with a shielding layer.
Furthermore, the portable quantum random number generating device comprises a USB-to-serial port chip, and the USB-to-serial port chip is respectively connected with the interface data pin and the single chip microcomputer.
Furthermore, the quantum random number chip, the single chip microcomputer, the power management chip, the two USB interfaces and the two USB-to-serial port chips are all integrated on the same printed circuit board, and the two USB interfaces are respectively arranged on the left side and the right side of the printed circuit board.
Furthermore, the portable quantum random number generating device further comprises a shell, the shell and the printed circuit board adopt a detachable structure, and the shell is arranged on the outer side of the printed circuit board in a wrapping mode.
The utility model has the advantages that:
the utility model discloses well portable quantum random number generating device is equipped with 2 or the USB interface more than 2, can be simultaneously to many external devices transmission quantum random number, make between the computer, between the smart mobile phone, can share the quantum random number of custom length between smart mobile phone and the computer, use as the symmetric key in the encryption communication. Compared with a quantum random number generating device in the prior art, the quantum random number generating device generally adopts a PCI board card, does not adopt a USB interface, and does not have the function of simultaneously transmitting quantum random numbers to a plurality of external devices.
The utility model discloses in portable quantum random number generating device's volume reduce to 60mm (length) x 30mm (width) x 10mm (height) below, random number production rate more than 250 Kbps. The USB port is connected to the computer simply and conveniently, so that the use difficulty is reduced, and the encryption safety of data is improved.
Drawings
Fig. 1 is a schematic structural diagram of a portable quantum random number generator according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described in more detail with reference to the accompanying drawings, and the present invention includes, but is not limited to, the following embodiments.
As shown in the attached drawing 1, the utility model provides a portable quantum random number generating device, this portable quantum random number generating device include quantum random number chip, singlechip, power management chip and two at least USB interfaces and with USB interface number assorted USB commentaries on classics serial ports chip.
When the USB interface is connected with equipment such as a smart phone or a computer, external power is obtained through the connecting equipment to supply power for the random number chip and the single chip microcomputer. The USB interface is respectively connected with the power management chip and the USB-to-serial port chip; in one embodiment, the USB interface includes an interface data pin and an interface power pin; the interface power supply pin is connected with the power management chip and used for obtaining 5V voltage by an external power supply and inputting the voltage into the power management chip; the interface data pin is connected with the USB-to-serial port chip and used for receiving and sending D + and D-signal data.
The power management chip is respectively connected with the USB interface, the quantum random number chip and the single chip, and is used for converting an external power source acquired by the USB interface into adaptive voltage of the quantum random number chip and the single chip and supplying power to the quantum random number chip and the single chip. In one embodiment, the power management chip adopts an LM1117 voltage stabilizing chip, and the input end of the voltage stabilizing chip is connected with an interface power supply pin and is used for acquiring 5V voltage of an external power supply; the voltage stabilizing chip is used for converting the 5V voltage into a 3.3V level; the output end of the voltage stabilizing chip is respectively connected with the quantum random number chip and the single chip microcomputer and used for supplying power to the quantum random number chip and the single chip microcomputer.
The USB-to-serial port chip is respectively connected with the USB interface and the single chip microcomputer, and is used for converting an I2C signal output by the single chip microcomputer into a USB signal and sending the USB signal to the connecting equipment through the USB interface. In one embodiment, the USB-to-serial port chip is a CH340N type chip, one end of the USB-to-serial port chip is connected with the USB-to-serial port chip, and the other end of the USB-to-serial port chip is connected with the single chip microcomputer.
The quantum random number chip is provided with an I2C interface and a power interface, is connected with the data pin of the singlechip through an I2C interface, and is connected with the power management chip through a random number power supply pin. In the embodiment, the quantum random number chip adopts an IDQ250C model, and the rate of generating the quantum random number by the quantum random number chip reaches more than 250 Kbps; the quantum random number chip outputs a random number to the singlechip after the power supply pin acquires a power supply.
The singlechip comprises a singlechip data pin and a singlechip power supply pin, the singlechip data pin is respectively connected with the quantum random number chip and the plurality of groups of USB-to-serial port chips, and the singlechip power supply pin is connected with the power management chip; the single chip microcomputer is used for sending the random number sent by the quantum random number chip to the external equipment through caching and synchronous processing after the external equipment obtains the random number request. In this embodiment, the single chip microcomputer is of a C8051F320 type, and the quantum random number chip performs unidirectional data transmission with the single chip microcomputer through a data pin of the single chip microcomputer; the single chip microcomputer is in bidirectional data transmission with the USB-to-serial port chips through the single chip microcomputer data pins and is used for receiving random number instructions requested by the external equipment and outputting random numbers generated by the quantum random number chips to the external equipment. The connection part can also be provided with a shielding layer in consideration of EMC (electro magnetic compatibility) problems possibly generated between the singlechip controller and the quantum random number chip.
In this embodiment, the quantum random number chip, the single chip, the power management chip, the two USB interfaces and the two USB serial-to-serial chips in the portable quantum random number generator are all integrated on the same printed circuit board, and the two USB interfaces are respectively disposed on the left and right sides of the printed circuit board; the portable quantum random number generating device further comprises a shell, the shell and the printed circuit board are of a detachable structure, the shell is coated on the outer side of the printed circuit board, openings are formed in the positions, matched with the two USB interfaces, of the shell, the length of the shell is 64mm, the width of the shell is 32mm, and the thickness of the shell is 10 mm.
The utility model discloses when well quantum random number generating device inserted computer or smart mobile phone's USB port, acquire external power source, supply power for quantum random number chip and singlechip through voltage regulation management device. After the quantum random number is electrified, the quantum random number is sent to the single chip microcomputer through the I2C interface in real time. And after receiving an instruction from a computer or a smart phone from the USB port, the single chip microcomputer starts to acquire the quantum random number. The single chip microcomputer caches and synchronizes the quantum random number, and transmits the quantum random number to the computer or the smart phone through a serial port communication protocol, so that the computer or the smart phone obtains the quantum random number. And when the single chip microcomputer sends enough quantum random numbers to the computer or the smart phone according to the data length specified by the instruction, the single chip microcomputer stops sending the quantum random numbers, waits for a new instruction of the computer or the smart phone, or disconnects the power supply connection along with the USB being pulled out.
The utility model discloses well quantum random number generating device is according to communication protocol with the same quantum random number send 2 in real time and on 2 above computers or the smart mobile phone, make between the computer, between the smart mobile phone, can share the quantum random number of custom length between smart mobile phone and the computer, can regard as the symmetric key in the encryption communication to use.
The present invention is not limited to the above embodiments, and those skilled in the art can adopt other embodiments to implement the present invention according to the disclosure of the embodiments and the drawings, and therefore, all the design structures and ideas of the present invention can be adopted to do some simple transformations or modified designs, and all fall into the protection scope of the present invention.
Claims (5)
1. A portable quantum random number generating device is characterized by comprising a quantum random number chip, a single chip microcomputer, a power management chip and at least two USB interfaces;
the quantum random number chip is connected with the single chip microcomputer, the quantum random number chip performs unidirectional data transmission to the single chip microcomputer, and the quantum random number chip is used for generating a quantum random number;
the USB interface comprises an interface data pin and an interface power supply pin, and the single chip microcomputer is connected with the interface power supply pins of the USB interfaces and performs bidirectional data transmission; the interface power supply pin is connected with the power management chip; the USB interfaces are respectively and simultaneously connected with different devices, and the quantum random numbers are shared by the devices;
the single chip microcomputer is used for acquiring the quantum random number and sending the quantum random number to the equipment through the USB interface;
and the power management chip is respectively connected with the quantum random number chip and the singlechip and supplies power to the quantum random number chip and the singlechip.
2. The portable quantum random number generating device of claim 1, wherein the connection structure of the single chip microcomputer and the quantum random number chip is provided with a shielding layer.
3. The portable quantum random number generating device of claim 1, wherein the portable quantum random number generating device comprises a USB to serial port chip, and the USB to serial port chip is connected to the interface data pin and the single chip microcomputer, respectively.
4. The portable quantum random number generating device of claim 3, wherein the quantum random number chip, the single chip, the power management chip, the two USB interfaces and the two USB-to-serial port chips are integrated on a same printed circuit board, and the two USB interfaces are respectively arranged on the left side and the right side of the printed circuit board.
5. The portable quantum random number generator of claim 4, further comprising a housing, wherein the housing and the printed circuit board are in a detachable structure, and the housing is disposed outside the printed circuit board.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121020102.1U CN214591472U (en) | 2021-05-13 | 2021-05-13 | Portable quantum random number generating device |
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| CN202121020102.1U CN214591472U (en) | 2021-05-13 | 2021-05-13 | Portable quantum random number generating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114726515A (en) * | 2022-03-25 | 2022-07-08 | 杭州舜时科技有限公司 | Quantum encryption communication method and corresponding communication system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114726515A (en) * | 2022-03-25 | 2022-07-08 | 杭州舜时科技有限公司 | Quantum encryption communication method and corresponding communication system |
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