CN112615823A - Private encryption communication method and system for secondary encryption - Google Patents
Private encryption communication method and system for secondary encryption Download PDFInfo
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- 230000006854 communication Effects 0.000 title claims abstract description 111
- 238000004891 communication Methods 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000005538 encapsulation Methods 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 claims description 7
- 238000013507 mapping Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 230000010354 integration Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/26—Special purpose or proprietary protocols or architectures
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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
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
- H04L9/0866—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving user or device identifiers, e.g. serial number, physical or biometrical information, DNA, hand-signature or measurable physical characteristics
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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
- H04L9/0861—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
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Abstract
The invention provides a twice-encrypted private encryption communication method and a system, wherein the twice-encrypted private encryption communication method comprises an encryption method and a decryption method, wherein the encryption method comprises the following steps: forming a JSON data packet by using JSON packets for the application data of the Internet of things; carrying out AES encryption on the JSON data packet to obtain initial encrypted data; the initial encrypted data is subjected to shell encapsulation based on an RF433 communication protocol to form an encrypted data packet; the decryption method comprises the following steps: performing unshelling processing on the received encrypted data packet based on an RF433 communication protocol to obtain RF433 unshelling data; performing AES decryption on the RF433 unshelled data to obtain decrypted initial data; and performing JSON analysis on the decrypted initial data to obtain the application data of the Internet of things. By the technical scheme provided by the invention, the integration of the safety and the easy connection of the Internet of things and the high efficiency of data communication is realized.
Description
Technical Field
The invention relates to the technical field of private encryption communication of secondary encryption of an internet of things gateway, in particular to a private encryption communication method and system of secondary encryption.
Background
With the increasing variety of terminals of the internet of things, particularly in the field of smart homes, various terminals of the internet of things appear, such as fingerprint locks, intelligent clothes hangers, intelligent household appliances, intelligent curtains, intelligent lighting equipment and the like, when the terminals of the internet of things are connected with a cloud server, the problems of safety and efficiency exist, due to the diversification of the terminals of the Internet of things, the terminals of the Internet of things have the phenomena of non-uniform data packaging and inconsistent aging requirements during data transmission, meanwhile, the method has the requirements on safety, different encapsulation and safety communication protocols are required to be used for different terminals during implementation, so that the implementation is difficult, the terminals are not easy to connect, meanwhile, the security of the internet of things is contradictory to the easy connection of the terminal and the high efficiency of data communication, so that the safety of the internet of things is improved, and the easy connection of the terminal and the high efficiency of data communication are negatively affected. Meanwhile, the communication protocol of the terminal is different from that of the cloud server, and protocol conversion is required during communication.
Disclosure of Invention
The invention mainly aims to provide a private encryption communication method and system for secondary encryption, and aims to solve the problems of safety and easy connection of the Internet of things and high efficiency of data communication.
In order to achieve the above object, the present invention provides a twice-encrypted private encryption communication method, which is applied to data communication between an internet of things gateway and an internet of things terminal, and includes an encryption method and a decryption method, where the encryption method includes:
forming a JSON data packet by using JSON packets for the application data of the Internet of things;
carrying out AES encryption on the JSON data packet to obtain initial encrypted data;
the initial encrypted data is subjected to shell encapsulation based on an RF433 communication protocol to form an encrypted data packet;
the decryption method comprises the following steps:
performing unshelling processing on the received encrypted data packet based on an RF433 communication protocol to obtain RF433 unshelling data;
performing AES decryption on the RF433 unshelled data to obtain decrypted initial data;
and performing JSON analysis on the decrypted initial data to obtain the application data of the Internet of things.
Further, the AES encrypting the JSON data packet comprises: the internet of things gateway and the internet of things terminal generate a shared key by using an exchange random number and an equipment ID when being paired and bound, generate a dynamic key by using the shared key when in data communication, and encrypt data based on AES by using the dynamic key.
Further, the step of encapsulating the initial encrypted data by adding a device mapping number of the bound internet of things terminal; the de-shelling process is to remove the device mapping number.
Meanwhile, the invention also provides a twice-encrypted private encryption communication system which comprises an Internet of things gateway, a plurality of Internet of things terminals and a cloud server, wherein the Internet of things gateway is respectively connected with each Internet of things terminal through an RF433 communication protocol and by using the twice-encrypted private encryption communication method, and the Internet of things gateway is connected with the cloud server.
Preferably, the gateway of the internet of things comprises a communication module, wherein the communication module uses an RF433 chip, and the RF433 chip comprises a coordinator chip and a data communication chip.
Preferably, the coordinator chip is configured to listen to a link request of the internet of things terminal, scan a noise channel, identify and shield an interference channel, and allocate an available data communication channel.
Preferably, the data communication chip is used for realizing data transmission and heartbeat link maintenance.
Preferably, the internet of things gateway is connected with a cloud server by using an MQTT protocol and sends the internet of things application data to the cloud server.
According to the private encryption communication method and system adopting the secondary encryption, the fusion of the safety and the easy connection of the Internet of things and the high efficiency of data communication is realized by using the private encryption communication method adopting the JSON and AES secondary encryption, and the communication mode of JSON package, AES encryption and RF433 shell-added packaging is adopted for the application data of the Internet of things, so that the gateway can be conveniently transmitted to the cloud while the safety and the reliability of communication are ensured, and the purpose that the gateway is irrelevant to the application of equipment is achieved; meanwhile, the power consumption of the terminal of the Internet of things is reduced, application, encryption and hardware separation are realized to achieve code sharing, and encoding, debugging and maintenance are facilitated.
Drawings
Fig. 1 is a schematic flowchart of an encryption method in a private encryption communication method of twice encryption according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a decryption method in the twice-encrypted private encryption communication method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a private encryption communication system with twice encryption according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a communication flow between a terminal and a two-way RF433 gateway according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
With reference to fig. 1 and fig. 2, the present invention provides a twice-encrypted private encryption communication method, where the twice-encrypted private encryption communication method is applied to data communication between an internet of things gateway and an internet of things terminal, and the twice-encrypted private encryption communication method includes an encryption method and a decryption method, where the encryption method includes:
step S11: forming a JSON data packet by using JSON packets for the application data of the Internet of things; the JavaScript Object Notation (JSON) is a lightweight data exchange format, and a universal JSON package is used between the gateway of the Internet of things and the terminal of the Internet of things, so that the gateway can conveniently transmit application data to the cloud server, and the purpose that the gateway is irrelevant to the application of equipment is achieved.
Step S12: carrying out AES encryption on the JSON data packet to obtain initial encrypted data; the gateway of the internet of things and the terminal of the internet of things use the exchange random number and the equipment ID to generate a shared key when being paired and bound, use the shared key to generate a dynamic key when in data communication, and use the dynamic key to encrypt data based on AES, wherein the shared key and the dynamic key can be dynamically negotiated and changed in the communication process.
Step S13: the initial encrypted data is subjected to shell encapsulation based on an RF433 communication protocol to form an encrypted data packet; and the step of adding a shell to the initial encrypted data is to add the equipment mapping number of the bound terminal of the internet of things. Radio Frequency (RF) 433 communication protocol adopts wireless Radio Frequency technology of receiving and dispatching, can reach 1000m communication distance under the condition of using the reinforcing antenna furthest, can satisfy the long-range domestic thing networking communication needs of having courtyard gate.
The decryption method comprises the following steps:
step S21: performing unshelling processing on the received encrypted data packet based on an RF433 communication protocol to obtain RF433 unshelling data;
step S22: performing AES decryption on the RF433 unshelled data to obtain decrypted initial data;
step S23: and performing JSON analysis on the decrypted initial data to obtain the application data of the Internet of things.
Specifically, a private encryption communication method of JSON (Java Server object) group package and AES (advanced encryption standard) secondary encryption is used between the gateway of the Internet of things and the terminal of the Internet of things; the shared key is generated when the terminal is bound with the gateway, the dynamic key is generated by the bound shared key during data communication, and AES encryption is realized by using the dynamic key, so that the security of the Internet of things is improved, the privacy of the terminal binding and dynamic key generating method is ensured, and the security strength of data is enhanced. Meanwhile, the data key value format of the universal JSON group packet can simply and effectively objectify different terminals, ensures the easy connection diversity of different types of terminals and also ensures the easy connection.
Referring to fig. 3, the invention further provides a twice-encrypted private encryption communication system, where the twice-encrypted private encryption communication system includes an internet of things gateway 1, a plurality of internet of things terminals 2, and a cloud server 3, the internet of things gateway 1 is connected to each internet of things terminal 2 through an RF433 communication protocol and using the above-mentioned twice-encrypted private encryption communication method, and the internet of things gateway 1 is connected to the cloud server 3. The internet of things gateway 1 comprises a communication module, wherein the communication module uses an RF433 chip, and the RF433 chip comprises a coordinator chip and a data communication chip. The coordinator chip is used for monitoring a link request of the internet of things terminal, scanning a noise channel, identifying and shielding an interference channel and allocating an available data communication channel. The data communication chip is used for realizing data transmission and heartbeat link maintenance. In particular, in case of using an enhanced antenna, the transmission distance supported by the RF433 chip can be up to 1000 m. In order to ensure the safety and reliability of communication, the RF433 chip is used for realizing noise channel detection, channel negotiation and frequency hopping communication measures to avoid channel interference. Specifically, the communication module uses an RF433 chip with channel signal-to-noise ratio NSR detection, performs scanning detection on a local wireless channel in the initialization and communication processes, and establishes an effective channel list validchanelist; when the terminal is bound with the gateway, the gateway and the terminal use respective ValidChaneliList to carry out channel negotiation, and a communication channel list Commuschannel List is established; in the communication process, the terminal and the gateway calculate and switch channels according to time slots and simultaneously listen and synchronize a CommuscannelList channel. Validchanelist is only related to signal environment and is used for shielding interference channels, and commuchannellist is a subset of validchanelist and is a few communication channels allocated to a terminal by a gateway, so that the terminal is prevented from frequently switching channels, and the standby power consumption of a battery-type device is reduced. The validchanelist and commuchannellist both include dedicated channels as communication negotiation channels to facilitate reconnection after a chain is broken, and terminals can be given to wake up as required and only connect when communication is required. In the terminal sleep process, switching is carried out at time intervals, the channel is switched by taking the channel number of CommuschaneliList as a sequence, and the heartbeat packet sent by the gateway is intercepted so as to maintain normal link; and after the terminal retries for a plurality of times and does not receive the heartbeat packet of the gateway, restarting the channel negotiation mechanism.
Referring to fig. 4, a schematic view of a communication flow between an internet of things terminal and an internet of things gateway is shown, and in an embodiment of the present invention, the communication between the internet of things gateway and the internet of things terminal that supports secure transparent transmission includes: link request modes L1-L4, data communication modes D1-D4, and link heartbeat maintenance modes H1-H2, specifically, the link request modes include:
l1, the gateway scans all channels through the negotiator and establishes an effective channel list ValidChaneliList;
l2, the terminal sends a link request to the gateway through a negotiation channel ConsultChanel;
l3-the gateway accepts the link request and allocates a list commuchannellist of communication channels available to the terminal, and a communication time slot Tc.
L4 terminal reply ACK
The data communication modes include:
d1, at the time Tc negotiated by the link mode L3, the terminal and the data line RF433 chip of the gateway switch to the same data channel Commuschannel at the same time, the terminal sends the data packet to the gateway, thus carrying out normal data interaction;
d2: the gateway responds the data packet to the terminal; repeating the process of D1\ D2 in the allocated effective time slot to receive and transmit a plurality of data packets;
d3, when the communication is finished, the terminal sends a data transmission finishing request to the gateway and applies for the next communication time point;
d4, the gateway responds ACK and sets the updated CommuscannelList and the time Tc of the next communication to the terminal.
The linked heartbeat maintenance mode includes:
h1, the terminal sends heartbeat packet to the gateway at the time point Tc according to the channel set by the CommuscannelList of the last communication and waits for response;
h2: the gateway responds to the ACK and sets the updated commuchannellist and the time Tc for the next communication to the terminal.
In the terminal sleep process, switching channels by taking the channel number of CommuschaneliList as a sequence at time intervals, and sending a heartbeat packet to a gateway to maintain normal link; and if the gateway does not receive the heartbeat packet of the terminal for many times due to other reasons, automatically considering that the link is disconnected. And after the terminal does not receive the heartbeat ACK for many times, the terminal re-initiates a channel negotiation mechanism to the gateway.
The following steps of the encryption method and the decryption method of the private encryption communication method of the secondary encryption are realized in the communication process of the terminal 2 of the internet of things and the gateway 1 of the internet of things,
the encryption method comprises the following steps:
step S11: forming a JSON data packet by using JSON packets for the application data of the Internet of things; the general JSON package is used between the Internet of things gateway and the Internet of things terminal, so that the gateway can conveniently transmit application data to the cloud server, and the purpose that the gateway is irrelevant to the equipment application is achieved.
Step S12: carrying out AES encryption on the JSON data packet to obtain initial encrypted data; the gateway of the internet of things and the terminal of the internet of things use the exchange random number and the equipment ID to generate a shared key when being paired and bound, use the shared key to generate a dynamic key when in data communication, and use the dynamic key to encrypt data based on AES, wherein the shared key and the dynamic key can be dynamically negotiated and changed in the communication process.
Step S13: the initial encrypted data is subjected to shell encapsulation based on an RF433 communication protocol to form an encrypted data packet; and the step of adding a shell to the initial encrypted data is to add the equipment mapping number of the bound terminal of the internet of things.
The decryption method comprises the following steps:
step S21: performing unshelling processing on the received encrypted data packet based on an RF433 communication protocol to obtain RF433 unshelling data;
step S22: performing AES decryption on the RF433 unshelled data to obtain decrypted initial data;
step S23: and performing JSON analysis on the decrypted initial data to obtain the application data of the Internet of things.
The internet of things gateway 1 is connected with the cloud server 3, specifically, the internet of things gateway 1 is connected with the cloud server 3 by using an MQTT protocol and sends the internet of things application data to the cloud server 3. The MQTT protocol and the Message Queue Telemetry Transport (MQTT) are general Internet of things communication Transport protocols based on an Internet of things terminal and a cloud server, and because the RF433 communication protocol is not suitable for the MQTT protocol, the MQTT Internet of things universal protocol is used between the gateway and the cloud platform in order to meet the stability and the universality of the Internet of things cloud platform, and the cloud application of the terminal realizes transparent transmission through the Internet of things gateway. The security of the gateway and the cloud platform internet is mainly realized by SSL/TLS authentication encryption, https transmission and the like.
Compared with the prior art, the private encryption communication method and system adopting the secondary encryption, provided by the invention, realize the integration of the safety and the easy connection of the Internet of things and the high efficiency of data communication by using the private encryption communication method adopting the JSON and AES secondary encryption, ensure the safety and the reliability of communication and simultaneously facilitate the transparent transmission of the gateway to the cloud end by using the communication modes of JSON package, AES encryption and RF433 shell-added packaging of the application data of the Internet of things, and achieve the purpose that the gateway is irrelevant to the application of equipment; meanwhile, the power consumption of the terminal of the Internet of things is reduced, application, encryption and hardware separation are realized to achieve code sharing, and encoding, debugging and maintenance are facilitated.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (8)
1. The twice-encrypted private encryption communication method is applied to data communication between an Internet of things gateway and an Internet of things terminal, and comprises an encryption method and a decryption method, wherein the encryption method comprises the following steps:
forming a JSON data packet by using JSON packets for the application data of the Internet of things;
carrying out AES encryption on the JSON data packet to obtain initial encrypted data;
the initial encrypted data is subjected to shell encapsulation based on an RF433 communication protocol to form an encrypted data packet;
the decryption method comprises the following steps:
performing unshelling processing on the received encrypted data packet based on an RF433 communication protocol to obtain RF433 unshelling data;
performing AES decryption on the RF433 unshelled data to obtain decrypted initial data;
and performing JSON analysis on the decrypted initial data to obtain the application data of the Internet of things.
2. The twice-encrypted private encryption communication method according to claim 1, wherein the AES encrypting the JSON packet comprises: the internet of things gateway and the internet of things terminal generate a shared key by using an exchange random number and an equipment ID when being paired and bound, generate a dynamic key by using the shared key when in data communication, and encrypt data based on AES by using the dynamic key.
3. The private encrypted communication method based on the secondary encryption of claim 1, wherein the encapsulating of the initial encrypted data is to add a device mapping number of a bound terminal of the internet of things; the de-shelling process is to remove the device mapping number.
4. The twice-encrypted private encryption communication system is characterized by comprising an Internet of things gateway, a plurality of Internet of things terminals and a cloud server, wherein the Internet of things gateway is respectively connected with each Internet of things terminal through an RF433 communication protocol by using the twice-encrypted private encryption communication method as claimed in any one of claims 1 to 3, and the Internet of things gateway is connected with the cloud server.
5. The twice-encrypted private encryption communication system according to claim 4, wherein the IOT gateway includes a communication module using an RF433 chip, the RF433 chip including a coordinator chip and a data communication chip.
6. The private encryption communication system of claim 5, wherein the coordinator chip is configured to listen to a link request of the Internet of things terminal, scan a noise channel, identify and mask an interference channel, and allocate an available data communication channel.
7. The private encryption communication system of the secondary encryption according to claim 5, wherein the data communication chip is configured to implement data transmission and heartbeat link maintenance.
8. The twice-encrypted private encryption communication system according to claim 4, wherein the IOT gateway connects to a cloud server using MQTT protocol and sends the IOT application data to the cloud server.
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Application publication date: 20210406 |