CN112566114B - WLAN (Wireless local area network) mesh network secure communication method based on block chain - Google Patents
WLAN (Wireless local area network) mesh network secure communication method based on block chain Download PDFInfo
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- CN112566114B CN112566114B CN202011338318.2A CN202011338318A CN112566114B CN 112566114 B CN112566114 B CN 112566114B CN 202011338318 A CN202011338318 A CN 202011338318A CN 112566114 B CN112566114 B CN 112566114B
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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
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3236—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/009—Security arrangements; Authentication; Protecting privacy or anonymity specially adapted for networks, e.g. wireless sensor networks, ad-hoc networks, RFID networks or cloud networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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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
- H04L9/50—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using hash chains, e.g. blockchains or hash trees
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a WLAN (wireless local area network) mesh network security communication method based on a block chain, which mainly solves the problems of security and integrity of information transmission in the existing mesh network. The method comprises the steps of encrypting the pre-sent information of the sending equipment, calculating the hash value of the pre-sent information, uploading the hash value to an appointed block chain network, sending the encrypted information sigma (Message) to any access point AP by the sending equipment according to an appointed protocol, decrypting the encrypted information by the target equipment by using a private key of the target equipment, requesting the block chain network to obtain the hash value of the pre-sent information according to the ID of the sending equipment, comparing the hash value with the locally calculated hash value of the Message, and judging whether the Message is tampered to respond to the Response. Therefore, the safety of information transmission is realized, the information is reliably transmitted in the environment of an unreliable wlan mesh network system, and the information interaction process is not tampered and the credibility of communication is ensured. Therefore, the method is suitable for popularization and application.
Description
Technical Field
The invention relates to the technical field of network security, in particular to a WLAN mesh network security communication method based on a block chain.
Background
Block chaining is a term of art in information technology. The blockchain is essentially a decentralized database. By using a consensus algorithm, a block is agreed between block link points. The blocks are connected in series by means of a cryptography tool to form a chain structure. The block chain technology is suitable for the fields of data integrity and evidence storage due to the characteristics of tamper resistance and traceability.
Conventional routes have limited coverage. In order to break through the limitation of traditional routing networking, more and more users choose to upgrade the original wireless routing to the mesh network. However, security and integrity are challenged in the process of transferring information. In order to solve the problems of integrity and authenticity of information transmission in the existing wlan mesh multi-hop network, a block chain technology is introduced to uplink information hash values, data tamper resistance is realized through hash value comparison, and the integrity and authenticity of the information transmission in the wlan mesh multi-hop network are ensured.
Disclosure of Invention
The invention aims to provide a block chain-based wlan mesh network secure communication method, which mainly solves the problems of security and integrity of information transmission in the existing mesh network.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a WLAN mesh network security communication method based on a block chain comprises the following steps:
step S01, initializing a system, generating respective public keys and private keys by all devices in a wlan mesh network, and distributing the respective public keys of the devices to all devices in the network;
step S02, a sending device of the communication system generates a sending Request, generates a Message of pre-sending information by combining network environment information, and encrypts the Message by using a public key of a target device to obtain encrypted information sigma (Message);
step S03, a sending device of the communication system calculates a hash value of the Message of the pre-sent information, uploads the hash value to an appointed block chain network, and waits for successful uplink transmission;
step S04, the sending equipment sends the encryption information sigma (Message) to any access point AP according to an agreed protocol, and the encryption information sigma (Message) is finally transmitted to the target equipment through the AP route;
step S05, the target object device receives the encrypted information sigma (Message), decrypts the encrypted information sigma (Message) by using a private key of the target object device to obtain the Message of the pre-sending information, obtains a hash value corresponding to the Message of the pre-sending information according to the ID of the sending device to request the blockchain network, and compares the hash value with the hash value of the Message of the locally calculated pre-sending information to judge whether the Message of the pre-sending information is tampered so as to respond to the Response.
Further, in step S01, a public key encryption algorithm is selected for the system initialization stage.
Further, in the step S03, the hash value is generated by using a cryptographic hash function.
Further, in the step S03, the blockchain network is a private chain, or a federation chain, or a public chain.
Further, in step S04, the AP is any wireless device participating in the communication network, and a multi-hop network is formed by the AP for information transmission.
Further, in the step S05, the target device may determine whether a response needs to be returned according to the request information of the sending device; if response is needed, the return mode is consistent with the sending flow.
Compared with the prior art, the invention has the following beneficial effects:
the method comprises the steps of encrypting the pre-sent information of the sending equipment, calculating the hash value of the pre-sent information, uploading the hash value to an appointed block chain network, sending the encrypted information sigma (Message) to any access point AP by the sending equipment according to an appointed protocol, decrypting the encrypted information by the target equipment by using a private key of the target equipment, requesting the block chain network to obtain the hash value of the pre-sent information according to the ID of the sending equipment, comparing the hash value with the locally calculated hash value of the Message, and judging whether the Message is tampered to respond to the Response. Therefore, the safety of information transmission is realized, the information is reliably transmitted in the environment of an unreliable wlan mesh network system, and the information interaction process is not tampered and the credibility of communication is ensured.
Drawings
Fig. 1 is a flow chart of a communication method of the present invention.
Fig. 2 is a block diagram of an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
Examples
As shown in fig. 1, the wlan mesh network secure communication method based on block chain disclosed in the present invention includes the following steps:
step S01, initializing a system, generating respective public keys and private keys by all devices in a wlan mesh network, and distributing the respective public keys of the devices to all devices in the network; all devices generate respective public and private keys by using a public key encryption algorithm, such as ECC256, and the public keys can use a PKI mechanism for identity authentication to ensure the reliability of identities.
Step S02, the sending equipment of the communication system generates a sending Request, generates a pre-sending information Message by combining the network environment information, and encrypts the pre-sending information Message by using the public key of the target equipment to obtain encrypted information sigma (Message). The Request may be instruction information or sensor data, and the network environment information includes a device ID, a receiving device ID, information generation time, certificate information of the sending device, information of a block chain, and the like.
Step S03, the sending equipment of the communication system calculates the hash value of the Message of the pre-sent information, uploads the hash value to the appointed block chain network and waits for successful uplink. Specifically, the hash value may be generated by a cryptographic hash function, such as SHA-256. The calculation formula is as follows:
Hash＝H(M||ID||C||T…)
wherein, M represents a Request and represents the transmitted specific information; the ID represents a globally unique identification of the sending device; c represents certificate information; t represents a transmission time.
And step S04, the sending equipment sends the encryption information sigma (Message) to any access point AP according to an agreed protocol, and the encryption information sigma (Message) is finally transmitted to the target equipment through the AP route. Specifically, more than one route forwarding may be required in the information transmission process, and a TLS secure transmission protocol and the like may be used to ensure the security, privacy and the like of data;
step S05, the target object device receives the encrypted information sigma (Message), decrypts the encrypted information sigma (Message) by using a private key of the target object device to obtain the Message of the pre-sending information, obtains a hash value corresponding to the Message of the pre-sending information according to the ID of the sending device to request the blockchain network, and compares the hash value with the hash value of the Message of the locally calculated pre-sending information to judge whether the Message of the pre-sending information is tampered so as to respond to the Response. Specifically, the target device determines whether response information needs to be returned according to the request information, and if so, the return mode is consistent with the sending mode.
As shown in fig. 2, the framework diagram of an application example of the wlan mesh network security communication method of the present invention is used for transmitting gear status information, a gear sensor generates current gear information and links the information, the gear status information includes status information such as durability and rotation speed of a gear, and a transmitting device deployed on the gear transmits the status information to a processing center through the wlan mesh network. And forwarding the gear state information to the processing center through the AP route. The processing center calculates the hash value of the state information by using SHA-256, then obtains the information on the chain according to the ID of the gear sensor, compares whether the hash value of the information on the chain is equal to the hash value calculated locally or not, and completes the verification. And the processing center carries out the next step of indication according to the gear state information, and forwards the processing result and further gear operation information to the gear sensor in the same way to finish the operation.
Through the design, the secure communication method of the wlan mesh network disclosed by the invention solves the problem of information integrity under the environment of an unreliable wlan mesh network system, realizes reliable information transmission, and ensures that the information is not tampered and the credibility of communication in the information interaction process. Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, and has wide market prospect in the field of wireless local area network access.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.
Claims (6)
1. A WLAN mesh network security communication method based on a block chain is characterized by comprising the following steps:
step S01, initializing a system, generating respective public keys and private keys by all devices in a wlan mesh network, and distributing the respective public keys of the devices to all devices in the network;
step S02, a sending device of the communication system generates a sending Request, generates a pre-sending Message by combining network environment information, and encrypts the pre-sending Message by using a public key of a target device to obtain encrypted information sigma (Message); the network environment information comprises a device ID, a receiving device ID, information generation time, certificate information of a sending device and information of a block chain;
step S03, a sending device of the communication system calculates a hash value of the Message of the pre-sent information, uploads the hash value to an appointed block chain network, and waits for successful uplink;
step S04, the sending equipment sends the encryption information sigma (Message) to any access point AP according to an agreed protocol, and the encryption information sigma (Message) is finally transmitted to the target equipment through the AP route;
step S05, the target object device receives the encrypted information sigma (Message), decrypts the encrypted information sigma (Message) by using a private key of the target object device to obtain the Message of the pre-sending information, obtains a hash value corresponding to the Message of the pre-sending information according to the ID of the sending device to request the blockchain network, and compares the hash value with the hash value of the Message of the locally calculated pre-sending information to judge whether the Message of the pre-sending information is tampered so as to respond to the Response.
2. A block chain based wlan mesh network secure communication method as claimed in claim 1, wherein in step S01, a public key encryption algorithm is selected for system initialization.
3. A block chain based secure communication method for a wlan mesh network as claimed in claim 1, wherein in step S03, said hash value is generated by using a cryptographic hash function.
4. A method according to claim 1, wherein in said step S03, said blockchain network is a private chain, or a federation chain, or a public chain.
5. A method as claimed in claim 1, wherein in step S04, said AP is any wireless device joining the communication network, and a multi-hop network is formed by them for information transmission.
6. A block chain-based wlan mesh network secure communication method as claimed in claim 1, wherein in step S05, the target device can determine whether a response needs to be returned according to the request information of the sending device; if response is needed, the return mode is consistent with the sending flow.
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