CN106712938B - Quantum whiteboard communication method and system - Google Patents

Quantum whiteboard communication method and system Download PDF

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Publication number
CN106712938B
CN106712938B CN201611215253.6A CN201611215253A CN106712938B CN 106712938 B CN106712938 B CN 106712938B CN 201611215253 A CN201611215253 A CN 201611215253A CN 106712938 B CN106712938 B CN 106712938B
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quantum
communication network
random number
network service
key
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CN106712938A (en
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富尧
蔡晓宇
钟一民
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Zhejiang Shenzhou Liangzi Network Science & Technology Co ltd
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Zhejiang Shenzhou Liangzi Network Science & Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0852—Quantum cryptography
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H04L63/0435—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply symmetric encryption, i.e. same key used for encryption and decryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/06—Network architectures or network communication protocols for network security for supporting key management in a packet data network
    • H04L63/062—Network architectures or network communication protocols for network security for supporting key management in a packet data network for key distribution, e.g. centrally by trusted party
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications
    • H04L65/401—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference
    • H04L65/4015—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference where at least one of the additional parallel sessions is real time or time sensitive, e.g. white board sharing, collaboration or spawning of a subconference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/085—Secret sharing or secret splitting, e.g. threshold schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
    • H04L9/0869—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving random numbers or seeds

Abstract

The invention provides a quantum whiteboard communication method, and further provides a quantum whiteboard system, a quantum communication network service station, a quantum whiteboard server and a quantum whiteboard user side supporting the method. The invention realizes the quantum random number key encryption of whiteboard data communication through quantum whiteboard server management and key fob encryption, and the quantum random number key is a true random number, thereby greatly ensuring the security of whiteboard data. The key used by the invention is a quantum random number key shared by both encryption and decryption parties through a key card or a quantum key shared by quantum key distribution, and the white board data is transmitted only by using a symmetric encryption algorithm, so that the way of encrypting and transmitting the key of the symmetric encryption algorithm by using an asymmetric encryption algorithm is abandoned.

Description

Quantum whiteboard communication method and system
Technical Field
The invention relates to the technical field of quantum communication, in particular to a quantum whiteboard communication method and system, and particularly relates to a method and system for completing a highly-safe whiteboard conference based on a quantum communication network and a quantum key device.
Background
The interactive electronic whiteboard is an electronic device with a man-machine interaction function based on a computer system, and can realize the functions of writing, marking, geometric drawing, editing, printing, storing and the like by the online use of the interactive electronic whiteboard and devices such as a computer, a projector and the like and the data processing function of the computer, and realize the sharing of whiteboard data of users at different places through network communication. The interactive electronic whiteboard will become one of the main means for modern network teaching, remote conference, remote education and information exchange in the future.
The process of the interactive electronic whiteboard for network communication comprises the following steps: the whiteboard client logs in the whiteboard server to create whiteboard communication, and other whiteboard clients are added in the whiteboard communication by logging in the whiteboard server. The whiteboard client can input data such as graphics, characters and the like on the electronic whiteboard, and forwards the data to other clients participating in whiteboard communication after being processed by the whiteboard server, so that the other whiteboard clients can synchronously display the input data on respective electronic whiteboards. In actual communication, in order to ensure the safe transmission of the whiteboard data in the network, the whiteboard data needs to be encrypted by using a traditional encryption technology and then transmitted through a typical communication network.
In the prior art, a key used for encrypting whiteboard data is a pseudo-random number, the pseudo-random number is generated by using an algorithm, and if a random number seed and the algorithm are known, the randomness of the key is damaged, and the security of the encryption key is also damaged.
The existing electronic whiteboard system is communicated in a classical communication network, and the security is ensured by utilizing an encryption system of the classical communication network. In classical communication networks symmetric cryptographic algorithms are used for encrypting transmission data, while asymmetric algorithms are used for encrypting shared keys. It can be seen that the security of the asymmetric encryption algorithm affects the security of the entire classical communication system. The security of the asymmetric encryption algorithm is based on some specific complex mathematical operations, and with the development of quantum computers, the operation speed of the computers is exponentially multiplied, so that the classical asymmetric encryption algorithm is at risk of being cracked.
The existing electronic whiteboard system completes the encryption and decryption operation on data in a processing device, and the processing device is not safe and reliable. The information decrypted and output by the processing device has the risk of being stolen by lawless persons through the network.
Disclosure of Invention
The invention aims to solve the technical problem firstly to provide a quantum whiteboard communication method, which can improve the whiteboard communication security by using a quantum communication network and a quantum random number key. Therefore, the invention adopts the following technical scheme:
a quantum whiteboard communication method is characterized in that:
in data communication between a quantum whiteboard user side and a quantum whiteboard server, a quantum communication network service station accessed by the quantum whiteboard user side receives ciphertext data which is sent by the quantum whiteboard user side and encrypted by a quantum random number key in a user key fob, and decrypts the ciphertext data by using the stored quantum random number key shared by the quantum whiteboard user side and the user key fob to obtain plaintext data;
or if the quantum communication network service station accessed by the quantum whiteboard user side does not have the quantum random number key shared with the user key card, the quantum communication network service station accessed by the quantum whiteboard user side forwards the received ciphertext data to the quantum communication network service station with the shared quantum random number key through a quantum communication network, and the data is decrypted by the quantum communication network service station and then transmitted to the quantum communication network service station accessed by the quantum whiteboard user side through the quantum communication network; or the quantum communication network service station accessed by the quantum whiteboard user side applies for the shared quantum random number key to the quantum communication network service station with the shared quantum random number key through a quantum communication network, the shared quantum random number key ensures the transmission safety of the quantum communication network, and the quantum communication network service station accessed by the quantum whiteboard user side decrypts the ciphertext data of the quantum whiteboard user side to obtain plaintext data; the quantum communication network service station accessed by the quantum whiteboard user side encrypts data and sends the encrypted data to the quantum communication network service station accessed by the quantum whiteboard server;
the quantum communication network service station accessed by the quantum whiteboard server receives the ciphertext data and decrypts the ciphertext data to obtain plaintext data, and if the quantum whiteboard server and the quantum communication network service station accessed by the quantum whiteboard server have a shared quantum random number key, the quantum communication network service station encrypts the data by using the shared quantum random number key and sends the data to the quantum whiteboard server; if the quantum white board server and the quantum communication network service station accessed by the quantum white board server do not have the shared quantum random number key, sending the data encrypted by the quantum key shared in different places to the quantum communication network service station sharing the quantum random number key with the quantum white board server through a quantum communication network, decrypting and encrypting the data by the quantum communication network service station, and transmitting the data to the quantum white board server through the quantum communication network service station accessed by the quantum white board server; or the quantum communication network service station accessed by the quantum whiteboard server applies for the shared quantum random number key to the quantum communication network service station storing the quantum random number key shared with the quantum whiteboard server, transmits the shared quantum random number key to be encrypted, encrypts the used key to be the quantum key shared among the quantum communication network service stations, receives the shared quantum random number key and encrypts data by using the shared quantum random number key, and then sends the data to the quantum whiteboard server;
in data communication between the quantum white board server and the quantum white board user side, a quantum communication network service station accessed by the quantum white board server receives ciphertext data which is sent by the quantum white board server and encrypted by a quantum random number key, and decrypts the ciphertext data by using the quantum random number key stored in the ciphertext data to obtain plaintext data; if the quantum communication network service station accessed by the quantum whiteboard server does not have the quantum random number key shared with the quantum whiteboard server, the quantum communication network service station accessed by the quantum whiteboard server sends the received ciphertext data to the quantum communication network service station stored with the quantum random number key shared with the quantum whiteboard server through a quantum communication network, and the quantum communication network service station decrypts the ciphertext data and transmits the decrypted data to the quantum communication network service station accessed by the quantum whiteboard server through the quantum communication network; or the quantum communication network service station accessed by the quantum whiteboard server applies for the shared quantum random number key to the quantum communication network service station storing the quantum random number key shared with the quantum whiteboard server, transmits the shared quantum random number key to be encrypted, encrypts the used key as the quantum key shared between the quantum communication network service stations, receives the shared quantum random number key and decrypts the ciphertext data by using the shared quantum random number key to obtain plaintext data; the quantum communication network service station accessed by the quantum whiteboard server re-encrypts the data and sends the data to the quantum communication network service station accessed by the quantum whiteboard user end needing to receive the data;
the quantum communication network service station accessed by the quantum white board user terminal needing to receive the data decrypts the received ciphertext data to obtain plaintext data, if the quantum white board user terminal which needs to receive data has a shared quantum random number key with the quantum communication network service station which is accessed by the quantum white board user terminal, then the data is encrypted by using the shared quantum random number key and then sent to the quantum white board user side, if the quantum white board user side does not have the shared quantum random number key with the quantum communication network service station accessed by the quantum white board user side, the quantum communication network service station encrypts the received data and transmits the encrypted data to the quantum communication network service station with the shared quantum random number key through a quantum communication network, and the encrypted data is decrypted by the quantum communication network service station and then is encrypted by the quantum random number key shared with the quantum whiteboard user side and is transmitted to the quantum whiteboard user side through the quantum communication network service station accessed by the quantum whiteboard user side; or the quantum communication network service station applies for the shared quantum random number key to the quantum communication network service station with the shared quantum random number key through a quantum communication network, the transmission safety of the shared quantum random number key is ensured by the quantum communication network, and the quantum communication network service station accessed by the quantum whiteboard user side encrypts data by using the received shared quantum random number key and sends the encrypted data to the quantum whiteboard user side.
Furthermore, the quantum white board user end encrypts the sent data by using a quantum random number key in the user key card and then sends the encrypted data to the quantum communication network service station accessed by the quantum white board user end, and the received ciphertext data encrypted by using the quantum random number key is decrypted into a plaintext form by using the quantum random number key in the user key card by the quantum white board user end;
the quantum white board server encrypts the transmitted data by using a quantum random number key in the key fob and then transmits the encrypted data to the quantum communication network service station accessed by the quantum white board server, and the quantum white board server decrypts the received ciphertext data encrypted by using the quantum random number key in the key fob of the quantum white board server into a plaintext form by using the quantum random number key in the key fob of the quantum white board server.
Further, the quantum communication network service station generates and stores the quantum random number, and the key fob copies the quantum random number to the quantum communication network service station to form a shared quantum random number key between the quantum communication network service station and the key fob.
Furthermore, shared quantum keys are generated between the quantum communication network service stations which are directly connected through quantum key distribution, and the quantum keys are used for carrying out encryption transmission on data so as to complete the secure communication between the two places;
both the quantum white board user side and the quantum white board server need to access a quantum communication network through a certain quantum communication network service station.
Further, in quantum white board communication, the quantum white board user side sends the respective input data to the quantum white board server through a quantum communication network, and the quantum white board server processes the data and then safely sends the processed data to the quantum white board user side which has established the quantum white board communication connection and needs to receive the data through the quantum communication network.
Furthermore, a quantum random number key is stored in the key card, and the quantum random number key is used and then is invalidated; when the key fob needs to be supplemented with a quantum random number key, the quantum random number key needs to be supplemented to a quantum communication network service station.
The second technical problem to be solved by the present invention is to provide a quantum whiteboard system, which can support the quantum whiteboard communication method. Therefore, the invention adopts the following technical scheme:
a quantum whiteboard system, the system comprising:
a plurality of quantum communication network service stations, wherein each quantum communication network service station is directly or indirectly connected with other quantum communication network service stations to construct and form a quantum communication network; the quantum communication network service station distributes a quantum random number key, performs identity authentication on a key fob, and can further store a key file; the direct connection means that the two quantum communication network service stations do not need to carry out information transmission through a third quantum communication network service station, and the indirect connection means that at least 1 quantum communication network service station needs to carry out information transmission between the two quantum communication network service stations;
the quantum whiteboard client is connected to a quantum communication network service station, and a user key card or an access port with the user key card is arranged in the quantum whiteboard client;
and the quantum whiteboard server is connected to the quantum communication network service station, a key fob or an access port with the key fob is arranged in the quantum whiteboard server, and a quantum random number key is stored in the quantum whiteboard server key fob.
The quantum white board server monitors the network connection request of the quantum white board user side and establishes connection with the network connection request, the quantum white board server is responsible for login and logout management and authorization management of the quantum white board user side, white board data of the quantum white board user side are sent to the quantum white board server, and the white board data are sent to all the quantum white board user sides which establish white board communication connection through the quantum white board server.
The third technical problem to be solved by the present invention is to provide a quantum communication network service station, which can participate in the quantum whiteboard system and support the quantum whiteboard communication method. Therefore, the invention adopts the following technical scheme:
the quantum communication network service station is characterized by being provided with a quantum key distribution module, a quantum random number module and a key card certification issuing module;
the quantum random digital module is used for generating quantum random numbers for being acquired by a user key fob or a quantum whiteboard server key fob of a quantum whiteboard user side externally accessed to the quantum communication network; forming a shared quantum key between the user terminal and the quantum communication network service station;
the key fob certification issuing module is used for issuing a key fob and verifying a user who uses the key fob to perform quantum communication service; after the verification is successful, the user is a legal quantum communication network user and can perform services such as key card recharge and the like;
and the quantum key distribution module is used for carrying out quantum key distribution so as to realize the quantum key shared in different places among the quantum communication network service stations which are directly connected.
The quantum random number module comprises a quantum random number generator and a quantum random number key memory; the key fob certification issuing module includes a certification server; the quantum key distribution module comprises a quantum key distribution server and a quantum key management server; the quantum key distribution server is provided with an external communication connection interface, and the authentication server is provided with an external communication connection interface; the quantum key distribution server is connected with the quantum key management server, and the quantum key management server is connected with the authentication server; the quantum random number generator is connected with the quantum random number key storage, and the quantum random number key storage is connected with the authentication server.
The quantum random number key memory is provided with a port of a key fob.
Furthermore, the quantum communication network service station is also provided with a key file storage server, and the key file storage server is connected with the authentication server. Alternatively, the authentication server can be used to store a key file, provided with key file storage means.
The fourth technical problem to be solved by the present invention is to provide a quantum whiteboard server, which can access to a quantum communication network, participate in the quantum whiteboard system, and support the quantum whiteboard communication method. Therefore, the invention adopts the following technical scheme:
the quantum whiteboard server is characterized by comprising a receiving unit, a processing unit and a sending unit, wherein the receiving unit is used for receiving data; the sending unit is used for sending data; the processing unit is internally provided with a key fob or an access port with the key fob, the key fob stores a quantum random number key, and the key fob can encrypt or decrypt data to realize secure communication between the quantum whiteboard server and the quantum communication network service station.
The quantum white board server is mainly responsible for login and logout management, authorization management, receiving drawing, character and graphic sharing and the like of the quantum white board user side, and meanwhile, network connection requests of specific ports of the quantum white board user side are monitored and connected with the quantum white board user side, so that data of the quantum white board user side can be sent to the quantum white board server, and after being processed by the quantum white board server, the data are sent to all quantum white board user sides which are established with white board communication connection.
The fifth technical problem to be solved by the present invention is to provide a quantum whiteboard client, which can access to a quantum communication network, participate in the quantum whiteboard system, and support the quantum whiteboard communication method. Therefore, the invention adopts the following technical scheme:
quantum whiteboard user side, its characterized in that: the quantum white board user side is provided with a quantum white board input device, a quantum white board display device, a quantum white board input device and a quantum white board display device, or a quantum white board input and display device, and is also provided with a quantum white board processing device;
when the quantum white board input and display device is arranged, the quantum white board processing device is connected with the quantum white board input device; when the quantum white board display device and the quantum white board input device are arranged at the same time, the quantum white board processing device is respectively connected with the quantum white board display device and the quantum white board input device.
The quantum white board input device, the quantum white board display device and the quantum white board input and display device are all internally provided with a user key card or an access port with the user key card.
The quantum whiteboard processing device is equipment for performing network communication between a quantum whiteboard user side and a quantum communication network, and is responsible for sending data encrypted by a quantum random number key received from the quantum communication network to the quantum whiteboard display device when being connected with the quantum whiteboard display device; when the quantum white board input device is connected, the quantum white board input device is responsible for sending data encrypted by the quantum random number key received from the quantum white board input device to a quantum communication network; the quantum whiteboard input device is used for acquiring data input by the whiteboard, encrypting the acquired data into a ciphertext form by using a quantum random number key through a user key fob, and sending the ciphertext form to the quantum whiteboard processing device; the quantum whiteboard display device is used for receiving the data encrypted by the quantum random number key from the quantum whiteboard processing device, decrypting the data by the user key card and displaying the decrypted data.
The quantum whiteboard processing device is a device for network communication between a quantum whiteboard user side and a quantum communication network, and comprises fixed communication equipment and mobile communication equipment, preferably a computer, a tablet computer, a mobile phone and the like.
The quantum whiteboard input device, the quantum whiteboard display device and how the quantum whiteboard input and display device displays and inputs can refer to the traditional electronic whiteboard system.
The quantum whiteboard user side can have four models, the first model is only a quantum whiteboard input device and a quantum whiteboard processing device, a key fob (which can also be in a plug-in type) is arranged in the quantum whiteboard input device, and the model only has an input function. The second model is a quantum whiteboard display device and a quantum whiteboard processing device, the quantum whiteboard display device is internally provided with a key fob (which can also be in a plug-in type), and the model only has a display function. The third model comprises a quantum whiteboard input and display device and a quantum whiteboard processing device, wherein the quantum whiteboard input and display device is a device integrating the quantum whiteboard input device and the quantum whiteboard display device, and shares a key fob or an access port of a user key fob. The fourth model comprises a quantum whiteboard input device, a quantum whiteboard display device and a quantum whiteboard processing device, wherein the quantum whiteboard input device and the quantum whiteboard display device are both internally provided with a key fob (a plug-in type can also be adopted). The model has both the input function and the display function, and is a mainstream model of a quantum whiteboard user side.
The user key cards are network access licenses of the quantum communication network, and each user key card has a unique ID which is approved by the quantum communication network to be legal; the internal structure of the key fob comprises a CPU, a memory and a storage, and the key fob is provided with an operating system.
The server's key fob and the user's key fob may store a key fob ID, a quantum random number key, a digest extraction policy, and an encryption policy. The algorithm used to extract the digest may be a classical hash function such as SHA-3 or a universal hash function, and if a universal hash function is used, the key used by the universal hash function is provided by the key fob, preferably a Toeplitz matrix as the universal hash function. In addition, any algorithm or strategy for the purpose of obtaining a summary is within the scope of the present invention.
The user KEY card is an important device used for encrypting and decrypting data by a user, and when the user machine is a personal computer, the preferred expression form of the user KEY card is a USB KEY or a personal computer mainboard board card; when the user is a mobile terminal, the preferred form of presentation of the user KEY fob is SD KEY or a mobile terminal motherboard chip.
With the advance of the practical application of quantum communication, the quantum communication has a wider prospect in the aspect of networking application. The quantum communication device completes the distribution of the allopatric key by utilizing a BB84 protocol, wherein the key is a quantum key of which the true randomness is ensured by quantum characteristics, and the quantum key is used for encrypting data transmitted in the network, so that the high safety of information transmission in the network can be ensured. The establishment of quantum communication networks relies not only on the true random numbers based on quantum effects, but also on the distribution of quantum keys. The development direction of future communication networks is quantum communication networks with security guaranteed by quantum mechanics.
The invention relates to a communication method and a whiteboard system which are characterized in that data in the existing interactive electronic whiteboard is encrypted through a quantum random number key and transmitted through a quantum communication network to form a quantum communication key to ensure safety. This whiteboard system is also referred to as quantum whiteboard in the present invention.
In the invention, the key used for encrypting and decrypting the whiteboard data is a quantum random number key from a key fob, the quantum random number key is a true random number generated by a quantum true random number generator, and the quantum random number key has true randomness, thereby ensuring the safety of transmission of the whiteboard data from a user side to a quantum communication network.
The quantum random number key or the quantum key used by the two communication parties in the invention is shared by the two parties in a form of key fob or quantum key distribution, only a symmetric encryption algorithm is used for white board data, and a mode of encrypting and transmitting the key of the symmetric encryption algorithm by using an asymmetric encryption algorithm is abandoned. The quantum key shared in the quantum communication network is generated and distributed by utilizing a BB84 protocol, and the security of the quantum key is ensured by quantum mechanics, so that the transmission of the whiteboard data in the quantum communication network has extremely high security. The quantum key shared between the quantum white board user side or the quantum white board server and the quantum communication network service station is distributed in a mode of key fob copying, so that transmission of white board data at an access point of the quantum communication network has extremely high security.
Drawings
FIG. 1: the quantum white board user side and the quantum white board server are accessed to the quantum communication network structure chart.
FIG. 2: the invention discloses a quantum whiteboard system communication networking diagram.
FIG. 3: the quantum whiteboard user side is a block schematic diagram of a quantum whiteboard processing device and quantum whiteboard input device combination model.
FIG. 4: the quantum whiteboard user side is a block schematic diagram of a quantum whiteboard display device and quantum whiteboard processing device combined model.
FIG. 5: the quantum white board input device and the quantum white board display device in the quantum white board user side are separated in a square schematic diagram.
FIG. 6: the quantum whiteboard input device and the quantum whiteboard display device in the quantum whiteboard user side are integrated into a square schematic diagram.
FIG. 7: the invention relates to a structural block diagram of an implementation mode of a quantum whiteboard system.
Detailed Description
The quantum whiteboard system encrypts and stores data in the interactive electronic whiteboard through a quantum key, and decrypts and safely transmits all the encrypted whiteboard data through a quantum communication network to form the whiteboard system which ensures the safety by the quantum key. This whiteboard system is also referred to as quantum whiteboard in the present invention. Therefore, how to display and input at the user end can refer to the conventional electronic whiteboard system, and the details are not repeated herein.
The features of the present invention will be described in further detail below with reference to the accompanying drawings.
Refer to fig. 1. The quantum whiteboard system comprises a plurality of quantum whiteboard clients, a quantum whiteboard server and a quantum communication network.
The quantum communication network is composed of a plurality of quantum communication network service stations which are directly or indirectly connected. Each quantum communication network service station internally comprises a quantum key distribution module, a quantum random number module and a key card certification issuing module.
The quantum random number module is used for generating quantum random numbers so as to form a shared quantum random number key between the user and the quantum communication network service station; the quantum random number module may employ the quantum random number generator and quantum random number key storage. The quantum key distribution module may employ a quantum key distribution server. The key fob certification issuing module is used for issuing a key fob and verifying a user who uses the key fob to perform quantum communication service, and can adopt a quantum key management server and a verification server.
Referring to fig. 7, one preferred approach is: the quantum random number module comprises a quantum random number generator and a quantum random number key memory; the key fob certification issuing module includes a certification server; the quantum key distribution module comprises a quantum key distribution server and a quantum key management server; the quantum key distribution server is provided with an external communication connection interface, and the authentication server is provided with an external communication connection interface; the quantum key distribution server is connected with the quantum key management server, and the quantum key management server is connected with the authentication server; the quantum random number generator is connected with the quantum random number key storage, and the quantum random number key storage is connected with the authentication server. The quantum communication network service station is also provided with a key file storage server.
The communication connection interface of the quantum key distribution server can adopt an optical fiber communication interface or an interface of network communication in other modes, so that the quantum key can be distributed and shared among quantum communication network service stations directly connected on a quantum communication network; the communication connection interface of the authentication server can be an optical fiber communication interface or an interface of other mode network communication, and is used for carrying out data communication with a user or other quantum communication network service stations.
The quantum white board user side comprises a quantum white board input device, a quantum white board processing device and a quantum white board display device; the quantum white board user side is accessed to the quantum communication network service station through the quantum white board processing device; and key fobs are arranged in the quantum whiteboard input device and the quantum whiteboard display device, so that the safe communication between a quantum whiteboard user side and a quantum communication network service station is realized.
The quantum whiteboard server internally comprises a receiving unit, a processing unit and a sending unit, wherein the processing unit is internally provided with a key fob, so that the secure communication between the quantum whiteboard server and the quantum communication network service station is realized.
In the figure, a quantum whiteboard user A is accessed to a quantum communication network service station A, a quantum whiteboard user B is accessed to a quantum communication network service station B, and a quantum whiteboard server is accessed to a quantum communication network service station C.
The key fob is a unique credential for any user terminal to access the quantum communication network. The user terminal needs to transact business to the website of the quantum communication network service station in advance to obtain the key fob, and becomes a legal user capable of accessing the quantum communication network. When a user needs to supplement the quantum random number key to the key fob, the quantum random number key needs to be supplemented to a quantum communication network service station.
The process of key fob issuance is as follows:
(1) the user carries the relevant material to the network point of the quantum communication network service station to apply for transacting the network access service.
(2) And auditing the user material, and handling the network access procedure for the user after the auditing is passed.
(3) And storing data such as user identification information, identification information of the current quantum communication network service station, identification information of authentication between the user and the quantum service station, quantum communication network ID of the key fob, quantum random number keys of a quantity specified by the user and the like into the key fob, and issuing the key fob for the user.
(4) And the user acquires the key fob, namely becomes a legal user accessing the quantum communication network.
Recharging of the key fob:
the process of the key card supplementing the key at the quantum communication network service station is called key card recharging. In order to ensure the safety of communication, the quantum random number key in the key card has the use rule but is not reused, and the quantum random number key is invalidated after being used. When the user end wants to recharge the key card, the user end needs to recharge the key card to the quantum communication network service station. Firstly, a key card authentication issuing module in the quantum communication network service station can carry out identity authentication on a key card charged previously, and after the authentication is successful, a safe quantum random number key can be supplemented from the quantum communication network service station.
Refer to fig. 1 and 2. The quantum communication network service stations which are directly connected generate a shared quantum key through quantum key distribution, and the secure communication between two places can be completed by using the quantum key to encrypt and transmit data. A plurality of quantum communication network service stations are directly or indirectly connected to form a quantum communication network, and any quantum communication network service station can carry out safe communication.
Any user wants to access the quantum communication network, the user needs to access the quantum communication network through a certain quantum communication network service station, namely, each quantum white board user side and each quantum white board server need to be connected with at least one quantum communication network service station, and then the user can establish safe communication with the quantum communication network.
In the data communication between the quantum white board user side and the quantum white board server, the quantum communication network service station accessed by the quantum white board user side receives the ciphertext encrypted by the quantum random number key sent by the quantum white board user side, decrypts the ciphertext by the quantum random number key stored in the quantum white board user side, if the quantum white board server is connected with the quantum white board server, then the quantum random number key is used for encryption, the quantum random number key used at the moment is the quantum random number key which is also copied in the quantum white board server key card, then sending to the quantum white board server, if the quantum white board server is not connected with it, then sending to the quantum communication network service station accessed by the quantum white board server through the quantum communication network after encryption, decrypting and then encrypting by the quantum communication network service station, sending to the quantum white board server, the quantum random number key used for re-encryption is a quantum random number key also copied in the quantum whiteboard server key fob;
in the data communication between a quantum white board user side and a quantum white board server, a quantum communication network service station accessed by the quantum white board server receives ciphertext encrypted by a quantum random number key sent by the quantum white board server, decrypts the ciphertext by using the quantum random number key stored in the quantum white board server, and encrypts the ciphertext by using the quantum random number key if the quantum white board user side needing to receive data is connected with the quantum white board user side, the quantum random number key is also copied in a user key card of the quantum white board user side at the moment, and then sends the ciphertext to the quantum white board user side, if the quantum white board user side is not connected with the quantum white board user side, the ciphertext is sent to the quantum communication network service station accessed by the quantum white board user side through a quantum communication network, the quantum communication network service station decrypts the ciphertext and then encrypts the ciphertext, and sends the ciphertext to the quantum white board server, and the quantum random number key used for re-encryption is also copied in the user card of the quantum white board The quantum random number key of (1).
Referring to fig. 3, the quantum whiteboard client includes a quantum whiteboard input device and a quantum whiteboard processing device; the quantum white board input device is internally provided with a key fob and can carry out data transmission with the quantum white board processing device.
Referring to fig. 4, the quantum whiteboard client includes a quantum whiteboard display device and a quantum whiteboard processing device; the quantum white board display device is internally provided with a key fob and can carry out data transmission with the quantum white board processing device.
Referring to fig. 5, the quantum whiteboard user side internally includes a quantum whiteboard input device, a quantum whiteboard processing device, and a quantum whiteboard display device; the quantum white board input device and the quantum white board display device are both internally provided with key fobs and can mutually transmit data with the quantum white board processing device.
Referring to fig. 6, the quantum whiteboard user side internally includes a quantum whiteboard input and display device and a quantum whiteboard processing device; the quantum white board input and display device is a device integrating the quantum white board input device and the quantum white board display device, and a key fob is shared to encrypt and decrypt data.
The first embodiment is as follows:
taking the example of two quantum white board clients establishing quantum white board communication service as an example, for distinction, it is noted that the quantum white board client a is accessed to the quantum communication network service station a, the quantum white board client B is accessed to the quantum communication network service station B, the quantum white board server is accessed to the quantum communication network service station C, and a quantum random number key shared between the quantum white board client and the quantum white board server and the quantum communication network service station accessed by the quantum white board client and the quantum white board server is defaulted.
(1) Data acquisition and transmission of quantum white board user end
The quantum white board input device collects data input to the white board, encrypts collected plaintext information into a ciphertext through a built-in key fob, and sends the ciphertext to the quantum white board processing device. And the quantum whiteboard processing device sends the received ciphertext information to the accessed quantum communication network service station. Namely, the quantum whiteboard client A sends the encrypted whiteboard data to the quantum communication network service station A, and the quantum whiteboard client B sends the encrypted whiteboard data to the quantum communication network service station B.
(2) Transmission of quantum white board data over quantum communication network
And after receiving the ciphertext information, the quantum communication network service station A decrypts the ciphertext information by using the shared quantum random number key to obtain plaintext information. The quantum communication network service station A encrypts plaintext information by using a quantum key shared in different places, and transmits the encrypted plaintext information to the quantum communication network service station C through a quantum communication network. And the quantum communication network service station C decrypts the ciphertext by using the shared quantum key to obtain plaintext information. And the quantum communication network service station C encrypts plaintext information by using a quantum random number key shared by the quantum whiteboard server and then sends the encrypted plaintext information to the quantum whiteboard server. The quantum communication network service station B transmits the whiteboard data to the quantum whiteboard server by using the same method.
If the quantum white board user side and the quantum white board server are connected to the same quantum communication network service station, the quantum communication network service station receives the ciphertext information from the quantum white board user side and then decrypts the ciphertext information by using the shared quantum random number key to obtain plaintext information. And then, the encrypted quantum random number key shared with the quantum white board server is used for encrypting and sending the encrypted quantum random number key to the quantum white board server.
(3) Receiving, processing and sending of data by quantum white board server
And the quantum white board server receives the ciphertext information from the quantum communication network service station A and the quantum communication network service station B and then decrypts the ciphertext information by using the built-in key fob to obtain plaintext information. And the quantum whiteboard server performs corresponding processing on the obtained plaintext information. And the quantum white board server encrypts the processed information by using a built-in key fob to obtain ciphertext information, and sends the ciphertext information to the accessed quantum communication network service station C.
And the quantum communication network service station C decrypts the received ciphertext and then encrypts the ciphertext into the ciphertext again, and transmits the ciphertext to the quantum communication network service station A and the quantum communication network service station B through the quantum communication network.
(4) Quantum whiteboard user side receives data and displays the data
After receiving the data sent by the quantum communication network service station C, the quantum communication network service station A and the quantum communication network service station B decrypt the data by using the shared quantum key to obtain plaintext information. And then, the quantum random number key shared by the quantum white board user side is used for encryption and then is sent to the quantum white board user sides, namely a quantum white board user side A and a quantum white board user side B, accessed to the white board communication. And the quantum white board processing device at the quantum white board user side receives the data and then sends the data to the quantum white board display device. The quantum white board display device decrypts the data by using a built-in key fob and displays the data.
Example two:
if the quantum communication network service station accessed by the quantum whiteboard user side and the quantum whiteboard server does not have the shared quantum random number key, the accessed quantum communication network service station needs to forward the received data to the quantum communication network service station with the shared quantum random number key through the quantum communication network for encryption and decryption. Or the accessed quantum communication network service station firstly applies for the shared quantum random number key from the quantum communication network service station sharing the quantum random number key and then carries out encryption and decryption operation on the data, and the transmission safety of the shared quantum random number key is ensured by the quantum communication network.
For convenience of description, it is noted that the quantum whiteboard user a is accessed to the quantum communication network service station a and shares a quantum random number key with the quantum communication service station a ', the quantum whiteboard user B is accessed to the quantum communication network service station B and shares a quantum random number key with the quantum communication network service station B ', and the quantum whiteboard server is accessed to the quantum communication network service station C and shares a quantum random number key with the quantum communication network service station C '.
(1) Data acquisition and transmission of quantum white board user end
The quantum whiteboard input device collects data input to the whiteboard, encrypts the collected plaintext data into ciphertext data through a built-in key fob, and sends the ciphertext data to the quantum whiteboard processing device. And the quantum whiteboard processing device transmits the received ciphertext data to the accessed quantum communication network service station. Namely, the quantum white board user A sends the ciphertext data to the quantum communication network service station A, and the quantum white board user B sends the ciphertext data to the quantum communication network service station B.
(2) Transmission of quantum white board data over quantum communication network
The method comprises the following steps: and the quantum communication network service station A sends the received ciphertext information to the quantum communication service station A' through the quantum communication network. And the quantum communication service station A' decrypts by using the shared quantum random number key to obtain plaintext information, and the plaintext information is encrypted again and then returned to the quantum communication network service station A through the quantum communication network. The quantum communication network service station A decrypts the ciphertext data by using the quantum key shared between the stations to obtain plaintext data, and then encrypts the plaintext data and transmits the encrypted plaintext data to the quantum communication network service station C through the quantum communication network.
The second method comprises the following steps: the quantum communication network service station A applies for the shared quantum random number key to the quantum communication network service station A', the quantum communication network ensures the transmission safety of the shared quantum random number key, the quantum communication network service station A decrypts the ciphertext data of the quantum whiteboard user side to obtain plaintext data, and the plaintext data is encrypted and then transmitted to the quantum communication network service station C through the quantum communication network.
The quantum communication network service station B transmits the ciphertext data to the quantum communication network service station C by using the same method. And the quantum communication network service station C decrypts the ciphertext by using the shared quantum key to obtain plaintext data.
The method comprises the following steps: the quantum communication network service station C transmits the received plaintext data to the quantum communication network service station C' through the quantum communication network. And the quantum communication network service station C' encrypts the quantum communication network service station C by using a quantum random number key shared by the quantum white board server and returns the encrypted quantum communication network service station C to the quantum communication network service station C through the quantum communication network. And the quantum communication network service station C directly sends the ciphertext data to the quantum whiteboard server.
The second method comprises the following steps: the quantum communication network service station C applies for a quantum random number key shared with the quantum whiteboard server to the quantum communication network service station C', the transmission safety of the shared quantum random number key is guaranteed by the quantum communication network, and then the quantum communication network service station C encrypts plaintext data by using the shared quantum random number key and sends the encrypted plaintext data to the quantum whiteboard server.
(3) Receiving, processing and sending of data by quantum white board server
And the quantum white board server receives the ciphertext data from the quantum communication network service station A and the quantum communication network service station B and then decrypts the ciphertext data by using the built-in key fob to obtain plaintext data. And the quantum whiteboard server performs corresponding processing on the obtained plaintext data. And the quantum white board server encrypts the processed data by using a built-in key fob to obtain ciphertext data, and sends the ciphertext data to the accessed quantum communication network service station C.
The method comprises the following steps: the quantum communication network service station C forwards the received ciphertext data to a quantum communication network service station C 'through a quantum communication network, the quantum communication network service station C' decrypts the ciphertext data by using a quantum random number key shared by the quantum whiteboard server and transmits the ciphertext data to the quantum communication network service station C through the quantum communication network, and the quantum communication network service station C decrypts the ciphertext data by using a quantum key shared by the stations to obtain plaintext data, encrypts the plaintext data again and transmits the plaintext data to the quantum communication network service station A and the quantum communication network service station B through the quantum communication network.
The second method comprises the following steps: the quantum communication network service station C applies for a quantum random number key shared with a quantum white board server to the quantum communication network service station C', the quantum communication network ensures the transmission safety of the shared quantum random number key, then the quantum communication network service station C decrypts ciphertext data by using the shared quantum random number key to obtain plaintext data, and the plaintext data is encrypted again and then is sent to the quantum communication network service station A and the quantum communication network service station B.
(4) Quantum whiteboard user side receives data and displays the data
After receiving the ciphertext data sent by the quantum communication network service station C, the quantum communication network service station A decrypts the ciphertext data by using the shared quantum key to obtain plaintext data.
The method comprises the following steps: the quantum communication network service station A respectively forwards the plaintext data to a quantum communication network service station A 'through a quantum communication network, and the quantum communication network service station A' encrypts by using a quantum random number key shared by the quantum whiteboard user end A and returns the encrypted data to the quantum communication network service station A. And finally, the quantum communication network service station A sends the ciphertext data to the quantum whiteboard user A.
The second method comprises the following steps: the quantum communication network service station A applies for a quantum random number key shared with a quantum whiteboard user A to the quantum communication network service station A', the quantum communication network ensures the transmission safety of the shared quantum random number key, then the quantum communication network service station A encrypts plaintext data by using the shared quantum random number key to obtain ciphertext data, and sends the ciphertext data to the quantum whiteboard user A.
And the quantum white board processing device of the quantum white board user side A receives the ciphertext data and then sends the ciphertext data to the quantum white board display device. The quantum white board display device decrypts the ciphertext data by using a built-in key fob and displays the ciphertext data.
The quantum white board user side B receives the data by the method and displays the data.
The above description is only exemplary of the present invention, and the scope of the present invention is not limited thereto, and any equivalent changes and modifications by those skilled in the art in light of the present invention are within the scope of the present invention.

Claims (7)

1. A quantum whiteboard communication method is characterized in that:
in data communication between a quantum whiteboard user side and a quantum whiteboard server, a quantum communication network service station accessed by the quantum whiteboard user side receives ciphertext data which is sent by the quantum whiteboard user side and encrypted by a quantum random number key in a user key fob, and decrypts the ciphertext data by using the stored quantum random number key shared by the quantum whiteboard user side and the user key fob to obtain plaintext data;
or if the quantum communication network service station accessed by the quantum whiteboard user side does not have the quantum random number key shared with the user key card, the quantum communication network service station accessed by the quantum whiteboard user side forwards the received ciphertext data to the quantum communication network service station with the shared quantum random number key through a quantum communication network, and the data is decrypted by the quantum communication network service station and then transmitted to the quantum communication network service station accessed by the quantum whiteboard user side through the quantum communication network; or the quantum communication network service station accessed by the quantum whiteboard user side applies for the shared quantum random number key to the quantum communication network service station with the shared quantum random number key through a quantum communication network, the shared quantum random number key ensures the transmission safety of the quantum communication network, and the quantum communication network service station accessed by the quantum whiteboard user side decrypts the ciphertext data of the quantum whiteboard user side to obtain plaintext data; the quantum communication network service station accessed by the quantum whiteboard user side encrypts data and sends the encrypted data to the quantum communication network service station accessed by the quantum whiteboard server;
the quantum communication network service station accessed by the quantum whiteboard server receives the ciphertext data and decrypts the ciphertext data to obtain plaintext data, and if the quantum whiteboard server and the quantum communication network service station accessed by the quantum whiteboard server have a shared quantum random number key, the quantum communication network service station encrypts the data by using the shared quantum random number key and sends the data to the quantum whiteboard server; if the quantum white board server and the quantum communication network service station accessed by the quantum white board server do not have the shared quantum random number key, sending the data encrypted by the quantum key shared in different places to the quantum communication network service station sharing the quantum random number key with the quantum white board server through a quantum communication network, decrypting and encrypting the data by the quantum communication network service station, and transmitting the data to the quantum white board server through the quantum communication network service station accessed by the quantum white board server; or the quantum communication network service station accessed by the quantum whiteboard server applies for the shared quantum random number key to the quantum communication network service station storing the quantum random number key shared with the quantum whiteboard server, transmits the shared quantum random number key to be encrypted, encrypts the used key as the quantum key shared between the quantum communication network service stations, receives the shared quantum random number key and encrypts data by using the shared quantum random number key, and then sends the encrypted data to the quantum whiteboard server;
in data communication between the quantum white board server and the quantum white board user side, a quantum communication network service station accessed by the quantum white board server receives ciphertext data which is sent by the quantum white board server and encrypted by a quantum random number key, and decrypts the ciphertext data by using the quantum random number key stored in the ciphertext data to obtain plaintext data; if the quantum communication network service station accessed by the quantum whiteboard server does not have the quantum random number key shared with the quantum whiteboard server, the quantum communication network service station accessed by the quantum whiteboard server sends the received ciphertext data to the quantum communication network service station stored with the quantum random number key shared with the quantum whiteboard server through a quantum communication network, and the quantum communication network service station decrypts the ciphertext data and transmits the decrypted data to the quantum communication network service station accessed by the quantum whiteboard server through the quantum communication network; or the quantum communication network service station accessed by the quantum whiteboard server applies for the shared quantum random number key to the quantum communication network service station storing the quantum random number key shared with the quantum whiteboard server, transmits the shared quantum random number key to be encrypted, encrypts the used key as the quantum key shared between the quantum communication network service stations, receives the shared quantum random number key and decrypts the ciphertext data by using the shared quantum random number key to obtain plaintext data; the quantum communication network service station accessed by the quantum whiteboard server re-encrypts the data and sends the data to the quantum communication network service station accessed by the quantum whiteboard user end needing to receive the data;
the quantum communication network service station accessed by the quantum white board user terminal needing to receive the data decrypts the received ciphertext data to obtain plaintext data, if the quantum white board user terminal which needs to receive data has a shared quantum random number key with the quantum communication network service station which is accessed by the quantum white board user terminal, then the data is encrypted by using the shared quantum random number key and then sent to the quantum white board user side, if the quantum white board user side does not have the shared quantum random number key with the quantum communication network service station accessed by the quantum white board user side, the quantum communication network service station encrypts the received data and transmits the encrypted data to the quantum communication network service station with the shared quantum random number key through a quantum communication network, and the encrypted data is decrypted by the quantum communication network service station and then is encrypted by the quantum random number key shared with the quantum whiteboard user side and is transmitted to the quantum whiteboard user side through the quantum communication network service station accessed by the quantum whiteboard user side; or the quantum communication network service station applies for the shared quantum random number key to the quantum communication network service station with the shared quantum random number key through a quantum communication network, the transmission safety of the shared quantum random number key is ensured by the quantum communication network, and the quantum communication network service station accessed by the quantum whiteboard user side encrypts data by using the received shared quantum random number key and sends the encrypted data to the quantum whiteboard user side.
2. The quantum whiteboard communication method of claim 1, wherein: the quantum whiteboard user end encrypts the sent data by using a quantum random number key in a user key card and then sends the encrypted data to the quantum communication network service station accessed by the quantum whiteboard user end, and the received ciphertext data encrypted by using the quantum random number key is decrypted into a plaintext form by using the quantum random number key in the user key card;
the quantum white board server encrypts the transmitted data by using a quantum random number key in the key fob and then transmits the encrypted data to the quantum communication network service station accessed by the quantum white board server, and the quantum white board server decrypts the received ciphertext data encrypted by using the quantum random number key in the key fob of the quantum white board server into a plaintext form by using the quantum random number key in the key fob of the quantum white board server.
3. The quantum whiteboard communication method of claim 1, wherein: the quantum communication network service station generates and stores a quantum random number, and the key fob goes to the quantum communication network service station to copy the quantum random number to form a shared quantum random number key between the quantum communication network service station and the key fob.
4. The quantum whiteboard communication method of claim 1, wherein: the quantum communication network service stations which are directly connected generate a shared quantum key through quantum key distribution, and the quantum key is used for carrying out encryption transmission on data to complete the secure communication between two places;
both the quantum white board user side and the quantum white board server need to access a quantum communication network through a certain quantum communication network service station.
5. The quantum whiteboard communication method of claim 1, wherein:
in quantum white board communication, the quantum white board user side sends respective input data to the quantum white board server through a quantum communication network, and the quantum white board server processes the data and then safely sends the processed data to the quantum white board user side which is established with the quantum white board communication connection and needs to receive the data.
6. The quantum whiteboard communication method of claim 1, wherein: a quantum random number key is stored in the key fob, and the quantum random number key is invalidated after being used;
when the key fob needs to be supplemented with a quantum random number key, the quantum random number key needs to be supplemented to a quantum communication network service station.
7. The quantum communication network service station is characterized by being provided with a quantum key distribution module, a quantum random number module and a key card certification issuing module;
the quantum random digital module is used for generating quantum random numbers for being acquired by a user key fob or a quantum whiteboard server key fob of a quantum whiteboard user side externally accessed to the quantum communication network;
the key fob certification issuing module is used for issuing a key fob and verifying a user who uses the key fob to perform quantum communication service;
the quantum key distribution module is used for carrying out quantum key distribution so as to realize the quantum key shared in different places among the quantum communication network service stations which are directly connected;
in the data communication between the quantum white board user side and the quantum white board server, the quantum communication network service station accessed by the quantum white board user side receives the ciphertext encrypted by the quantum random number key sent by the quantum white board user side, decrypts the ciphertext by the quantum random number key stored in the quantum white board user side, if the quantum white board server is connected with the quantum white board server, then the quantum random number key is used for encryption, the quantum random number key used at the moment is the quantum random number key which is also copied in the quantum white board server key card, then sending to the quantum white board server, if the quantum white board server is not connected with it, then sending to the quantum communication network service station accessed by the quantum white board server through the quantum communication network after encryption, decrypting and then encrypting by the quantum communication network service station, sending to the quantum white board server, the quantum random number key used for re-encryption is a quantum random number key also copied in the quantum whiteboard server key fob; in data communication between a quantum white board user side and a quantum white board server, a quantum communication network service station accessed by the quantum white board server receives ciphertext encrypted by a quantum random number key sent by the quantum white board server, decrypts the ciphertext by using the quantum random number key stored in the quantum white board server, and if the quantum white board user side needing to receive data is connected with the quantum white board user side, the ciphertext is encrypted by using the quantum random number key, the quantum random number key is also copied in a user key card of the quantum white board user side, and then is sent to the quantum white board user side, if the quantum white board user side is not connected with the quantum white board user side, the ciphertext is sent to the quantum communication network service station accessed by the quantum white board user side through a quantum communication network, the ciphertext is decrypted and then encrypted by the quantum communication network service station, and is sent to the quantum white board server, and the quantum random number key used for re-encryption is also copied in the user key card of the quantum white board user side Quantum random number key in (1).
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