WO2019237502A1 - Procédé et système de communication par cryptage dynamique utilisant une transmission de segmentation pour une maison intelligente - Google Patents

Procédé et système de communication par cryptage dynamique utilisant une transmission de segmentation pour une maison intelligente Download PDF

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Publication number
WO2019237502A1
WO2019237502A1 PCT/CN2018/101248 CN2018101248W WO2019237502A1 WO 2019237502 A1 WO2019237502 A1 WO 2019237502A1 CN 2018101248 W CN2018101248 W CN 2018101248W WO 2019237502 A1 WO2019237502 A1 WO 2019237502A1
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Prior art keywords
mobile terminal
smart home
module
home appliance
cloud
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PCT/CN2018/101248
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English (en)
Chinese (zh)
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王佳骏
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王佳骏
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Publication of WO2019237502A1 publication Critical patent/WO2019237502A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
    • 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
    • H04L63/0442—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 asymmetric encryption, i.e. different keys 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
    • H04L63/067—Network architectures or network communication protocols for network security for supporting key management in a packet data network using one-time keys
    • 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
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0807—Network architectures or network communication protocols for network security for authentication of entities using tickets, e.g. Kerberos
    • 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
    • H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
    • H04L9/3006—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy underlying computational problems or public-key parameters
    • H04L9/302—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy underlying computational problems or public-key parameters involving the integer factorization problem, e.g. RSA or quadratic sieve [QS] 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
    • H04L9/32—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
    • H04L9/321—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 involving a third party or a trusted authority
    • H04L9/3213—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 involving a third party or a trusted authority using tickets or tokens, e.g. Kerberos
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication

Definitions

  • the invention relates to the technical field of transmission security of smart home appliances, and in particular, to a smart home dynamic encrypted communication method and system using segmented transmission.
  • Intelligent devices integrate microprocessor, sensor technology and communication technology into traditional home appliances, make them intelligent and have network terminal functions. They can obtain and sense the home appliance's own status and service status anytime, anywhere, and can automatically control and Accept user remote control instructions inside and outside the house.
  • the information transmission process between the network terminal of the user's electronic device and the cloud server of the home appliance may be subject to security threats such as viruses, internal interception and destruction, illegal intrusion, illegal access, interception, destruction of information integrity, implantation and impersonation, and privacy leakage.
  • security threats such as viruses, internal interception and destruction, illegal intrusion, illegal access, interception, destruction of information integrity, implantation and impersonation, and privacy leakage.
  • Abdullahi Arabo a researcher at the University of Oxford in the United Kingdom, in his paper on privacy issues brought about by smart home technology, "In reality, smart devices store more information than we store in our brains. As a result, Smart devices can easily be targeted by hackers, Trojans, and unauthorized users.
  • the present invention proposes a smart home dynamic encrypted communication method and system using segmented transmission.
  • a smart home dynamic encrypted communication method using segmented transmission includes the following steps:
  • the smart home appliance establishes a binding relationship with the second mobile terminal and the first mobile terminal respectively and sends the binding relationship to the cloud;
  • the smart home appliances respectively establish a communication channel with the second mobile terminal and the first mobile terminal through the cloud, and a communication channel is established between the second mobile terminal and the first mobile terminal;
  • the first mobile terminal submits an access request to the smart home appliance and sends the access request to the cloud and the second mobile terminal;
  • the second mobile terminal After receiving the access request, the second mobile terminal sends the access request to the smart home appliance and the cloud, respectively;
  • the smart home appliances After receiving the access requests of the first mobile terminal and the second mobile terminal, the smart home appliances respectively agree on an encrypted channel through the cloud with the first mobile terminal and the second mobile terminal through the RSA encryption method;
  • the natural number m is sent to the smart home appliance through the encrypted channel
  • the smart home appliance acquires m to generate a natural number n and m ⁇ n, and sends n to the second mobile terminal;
  • the second mobile terminal sends the received y to the smart home appliance
  • the smart appliance After receiving the x and y, the smart appliance sets x as the first ciphertext and y as the last ciphertext. According to m and n, k is obtained. According to k, x and y are spliced to obtain the primary ciphertext and decrypted. information.
  • the step of establishing an RSA encrypted channel between the second mobile terminal and the smart home appliance includes:
  • the second mobile terminal makes an access request to the smart home appliance, and sends the request to the cloud;
  • the smart home appliance After receiving the access request, the smart home appliance generates a key identifier and sends the key identifier to the cloud;
  • the cloud sends the permission key to the smart home appliance and the permission token to the second mobile terminal;
  • the second mobile terminal sends the permission token to the smart home appliance. After the smart home appliance obtains the permission token, it checks the permission key with the permission key. After the verification, the smart home appliance establishes an encrypted connection with the second mobile terminal.
  • the step of establishing the RSA encrypted channel between the first mobile terminal and the smart home appliance includes:
  • the first mobile terminal makes an access request to the smart home appliance, and sends the request to the cloud;
  • the smart home appliance After receiving the access request, the smart home appliance generates a key identifier and sends the key identifier to the cloud;
  • the cloud sends the permission key to the smart home appliance, and sends the permission token to the first mobile terminal;
  • the first mobile terminal sends the permission token to the smart home appliance. After the smart home appliance obtains the permission token, it checks with the permission key, and after the verification passes, the smart home appliance establishes an encrypted connection with the first mobile terminal.
  • the second mobile terminal is a smart watch with a camera
  • the first mobile terminal is a mobile phone or a tablet computer with a camera
  • the binding relationship is code scanning binding.
  • the smart home appliance is connected to the first mobile terminal and the second mobile terminal, respectively, and the second mobile terminal Connected with the first mobile terminal.
  • the first mobile terminal includes:
  • a first communication module for communicating with a smart home appliance, a cloud server, and a second mobile terminal
  • a first encryption module configured to encrypt information
  • a first operation module configured to split the encrypted ciphertext
  • a first supplementary module configured to complete the split ciphertext with bytes
  • the first supplementary module, the first binding module, and the first encryption module are respectively connected to the first communication module, and the first operation module is respectively connected to the first encryption module and the first encryption module. Supplementary modules.
  • the second mobile terminal includes
  • a second communication module configured to communicate with the smart home appliance, the cloud server, and the first mobile terminal
  • a second encryption module configured to encrypt information
  • a second operation module configured to generate a random number m and calculate k
  • the second communication module is connected to the second binding module, the second encryption module, and the second operation module, respectively.
  • the smart home appliance includes
  • a binding module configured to bind with the first mobile terminal and the second mobile terminal
  • a communication module configured to communicate with the first mobile terminal, the second mobile terminal, and the cloud server;
  • An operation module for generating a random number n and calculating k An operation module for generating a random number n and calculating k
  • a combining module configured to combine the received ciphertexts sent by the first mobile terminal and the second mobile terminal;
  • Encryption module for encrypting information
  • Supplementary module which is used to complete the byte of the split ciphertext
  • the communication module is respectively connected with the encryption module, the binding module, the operation module, the decryption module and the supplementary module
  • the split module is connected with the encryption module and the supplementary module, respectively
  • the split module is connected to the communication and the confidential module respectively.
  • the first mobile terminal and the second mobile terminal are transmitted in sections, and decryption can only be obtained without decrypting according to k.
  • the first mobile terminal and the second mobile terminal generally use a smart phone and a smart watch.
  • the transmission distance is point-to-point transmission. The distance is short, which is convenient for users to monitor, while ensuring that k will not be leaked through the network.
  • the first mobile terminal, the second mobile terminal and the smart home appliances are dynamically encrypted. A dynamic key is generated for each access. It is difficult to crack; at the same time, the parameters m and n of k are also dynamically generated, and each time the encrypted channel between the second mobile terminal and the smart home appliance is just generated, an interaction is performed.
  • the second mobile terminal and the The encrypted channel between smart appliances no longer appears and does not give the outside world time to crack; the first mobile terminal must cooperate with the second mobile terminal to communicate with the smart appliances, and even if one of the terminals is lost, it will not cause information leakage; Both a mobile terminal and a second mobile terminal can stop the entire communication process at any time; the first mobile terminal and the second mobile terminal are separated Bound with smart appliances, even missing one terminal, but also to eliminate the loss of terminal and another terminal of the same model with camouflage smart appliances may operate.
  • FIG. 1 is a schematic flowchart of a method according to an embodiment of the present invention.
  • connection should be understood in a broad sense unless explicitly stated and limited otherwise.
  • they may be fixed connections or removable.
  • Connection, or integral connection it can be mechanical or electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements.
  • connection, or integral connection it can be mechanical or electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements.
  • a smart home dynamic encrypted communication method using segmented transmission includes the following steps:
  • the smart home appliance establishes a binding relationship with the second mobile terminal and the first mobile terminal respectively and sends the binding relationship to the cloud;
  • the smart home appliances respectively establish a communication channel with the second mobile terminal and the first mobile terminal through the cloud, and a communication channel is established between the second mobile terminal and the first mobile terminal;
  • the first mobile terminal submits an access request to the smart home appliance and sends the access request to the cloud and the second mobile terminal;
  • the second mobile terminal After receiving the access request, the second mobile terminal sends the access request to the smart home appliance and the cloud, respectively;
  • the smart home appliances After receiving the access requests of the first mobile terminal and the second mobile terminal, the smart home appliances respectively agree on an encrypted channel through the cloud with the first mobile terminal and the second mobile terminal through the RSA encryption method;
  • the natural number m is sent to the smart home appliance through the encrypted channel
  • the smart home appliance acquires m to generate a natural number n and m ⁇ n, and sends n to the second mobile terminal;
  • the second mobile terminal obtains n and calculates
  • k, and sends the number k to the first mobile terminal;
  • the second mobile terminal sends the received y to the smart home appliance
  • the smart appliance After receiving the x and y, the smart appliance sets x as the first ciphertext and y as the last ciphertext. According to m and n, k is obtained. According to k, x and y are spliced to obtain the primary ciphertext and decrypted. information.
  • the command length is shorter and the bytes are shorter, even if it is calculated using an asymmetric algorithm The amount will not be very large.
  • the ciphertext length is also determined. Therefore, different operation commands can be encrypted into a fixed-length ciphertext for transmission during an encrypted communication process. In the decryption process, as long as the ciphertext is ultimately complete, it can be deciphered, and whether it is packed during transmission is not affected by the ciphertext. Therefore, this patent adopts the method of subpackaging and supplementing.
  • the fixed-length ciphertext is divided into two parts before and after, and random characters are supplemented for each part, so that the encrypted ciphertext becomes an undecipherable garble.
  • the ciphertext is not decipherable until it is restored to a complete ciphertext.
  • it can also be agreed with the smart appliance to encrypt the ciphertext once, which will completely disrupt the character sequence.
  • the smart appliance After receiving the ciphertext, the smart appliance first sorts and decrypts it, and then restores the ciphertext. Decryption is performed to further increase the security of transmission.
  • the smart home appliance when the smart home appliance sends information to the first mobile terminal, the encrypted text is also distributed to the first mobile terminal and the second mobile terminal through encryption and packaging mode, and the second mobile terminal sends the information to the first mobile terminal.
  • the information is sent to the first mobile terminal, and the first mobile terminal performs decryption to obtain the information.
  • the second mobile terminal only enables the calculation and encryption mode when transmitting m and n information with the smart home appliance.
  • the second mobile terminal only assumes the information forwarding role of the first mobile terminal and does not participate in the calculation and saves power. Improve battery life, reduce chip requirements, and integrate it into a watch or bracelet.
  • a code scanning method may be adopted, such as dynamically generating a two-dimensional code on the display screen of the smart home appliance.
  • the first mobile terminal scans the two-dimensional code with the smart home appliance.
  • a binding relationship is established, and at the same time, the first mobile terminal and the second mobile terminal can also be bound in a code scanning manner.
  • the first mobile terminal may be a smart phone, and the second mobile terminal may be a smart watch with a camera.
  • the cipher text can also be segmented by manually entering k.
  • k is calculated by the smart watch, A fraudulent character is transmitted randomly, but the k value is displayed on the watch screen, and then the user manually enters the k value, which is similar to the verification code or the "general order" display token in Netease games, preventing k from being transmitted due to transmission problems. The possibility of leakage.
  • the step of establishing an RSA encrypted channel between the second mobile terminal and the smart home appliance includes:
  • the second mobile terminal makes an access request to the smart home appliance, and sends the request to the cloud;
  • the smart home appliance After receiving the access request, the smart home appliance generates a key identifier and sends the key identifier to the cloud;
  • the cloud sends the permission key to the smart home appliance and the permission token to the second mobile terminal;
  • the second mobile terminal sends the permission token to the smart home appliance. After the smart home appliance obtains the permission token, it checks the permission key with the permission key. After the verification, the smart home appliance establishes an encrypted connection with the second mobile terminal.
  • the step of establishing the RSA encrypted channel between the first mobile terminal and the smart home appliance includes:
  • the first mobile terminal makes an access request to the smart home appliance, and sends the request to the cloud;
  • the smart home appliance After receiving the access request, the smart home appliance generates a key identifier and sends the key identifier to the cloud;
  • the cloud sends the permission key to the smart home appliance, and sends the permission token to the first mobile terminal;
  • the first mobile terminal sends the permission token to the smart home appliance. After the smart home appliance obtains the permission token, it checks with the permission key, and after the verification passes, the smart home appliance establishes an encrypted connection with the first mobile terminal.
  • the terminal may send a session request to the smart home appliance by using UDP.
  • the smart home appliance After receiving the session request, the smart home appliance generates a key identifier, and the key identifier may be based on its own device DeviceID calculates the HASH value and XORs the 16 bytes before and after the HASH value to generate the key identifier UDP_KEY_ID, or generate the key identifier by other methods, as long as the key identifier is not less than 32 characters.
  • the smart home appliance can send the key identifier to the cloud and the terminal through the TCP / IP protocol. After the cloud receives the key identifier, it queries whether the device has a binding record in the cloud.
  • the smart home appliance After receiving the key ID, the smart home appliance submits a verification request to the cloud and sends the key ID to the cloud. After the cloud receives the key identifier, it checks whether the terminal that submitted the verification request has a binding relationship with the smart device corresponding to the key identifier according to the key identifier. If it exists, it randomly generates a session key of not less than 32 bits, and The session key is encrypted into a session cipher text according to the permission key, the permission key is encrypted to form a permission token, and the permission token and the session cipher text are sent to the terminal, respectively.
  • the present invention combines the authorization token with the session ciphertext, and the session ciphertext also functions as a domestic authorization token.
  • the session key value is encrypted by using the symmetric encryption algorithm based on the authorization key. Encrypt the value, and then stitch the encrypted value with the hash value of the session key to form the session ciphertext, which contains both the session key and the right key, and acts as a permission token and as a session.
  • the ciphertext reduces the number of sending steps and reduces the chance of leaking.
  • the remote terminal After the remote terminal receives the session cipher text, that is, the session key, it sends the session cipher text to the smart device for verification.
  • the smart device decrypts the session ciphertext according to the permission key, decrypts the session key and calculates the hash value, and checks the obtained hash value with the hash value in the permission token.
  • the second mobile terminal is a smart watch with a camera
  • the first mobile terminal is a mobile phone or tablet computer with a camera
  • the binding relationship is code scanning binding
  • the smart home appliance is connected to the first mobile terminal and the second mobile terminal, respectively, and the second mobile terminal Connected with the first mobile terminal.
  • the first mobile terminal includes:
  • a first communication module for communicating with a smart home appliance, a cloud server, and a second mobile terminal
  • a first encryption module configured to encrypt information
  • a first operation module configured to split the encrypted ciphertext
  • a first supplementary module configured to complete the split ciphertext with bytes
  • the first supplementary module, the first binding module, and the first encryption module are respectively connected to the first communication module, and the first operation module is respectively connected to the first encryption module and the first encryption module. Supplementary modules.
  • the second mobile terminal includes
  • a second communication module configured to communicate with the smart home appliance, the cloud server, and the first mobile terminal
  • a second encryption module configured to encrypt information
  • a second operation module configured to generate a random number m and calculate k
  • the second communication module is connected to the second binding module, the second encryption module, and the second operation module, respectively.
  • the smart home appliance includes
  • a binding module configured to bind with the first mobile terminal and the second mobile terminal
  • a communication module configured to communicate with the first mobile terminal, the second mobile terminal, and the cloud server;
  • An operation module for generating a random number n and calculating k An operation module for generating a random number n and calculating k
  • a combination module configured to combine the received ciphertexts sent by the first mobile terminal and the second mobile terminal;
  • Encryption module for encrypting information
  • Supplementary module which is used to complete the byte of the split ciphertext
  • the communication module is connected to the encryption module, the binding module, the operation module, the decryption module, and the supplementary module
  • the split module is connected to the encryption module and the supplementary module, respectively.
  • the split module is connected to the communication and the confidential module respectively.
  • the first mobile terminal may also have a decryption module and a combination module, so that both the first mobile terminal and the smart home appliance can implement information encryption and decryption.
  • the advantages of the present invention are: in the mode of segmented transmission of the first mobile terminal and the second mobile terminal, only garbled characters can be obtained by decrypting without splitting according to k; the first mobile terminal and the second mobile terminal generally use smart phones And smart watch, the transmission distance is point-to-point transmission, the distance is short, convenient for user monitoring, and at the same time ensure that k will not leak through the network; the first mobile terminal, the second mobile terminal and smart home appliances are dynamically encrypted, each time The access will generate a dynamic key, which is difficult to crack. At the same time, the parameters m and k of k are also dynamically generated, and each time the encrypted channel between the second mobile terminal and the smart home appliance is just generated, the communication process is performed.
  • the encrypted channel between the second mobile terminal and the smart home appliance no longer appears and does not give the outside world time to crack; the first mobile terminal must cooperate with the second mobile terminal to communicate with the smart home appliance, even if one of the terminals is lost, it will not Causes information leakage; both the first mobile terminal and the second mobile terminal can stop the entire communication process at any time; the first mobile terminal With the second mobile terminal and smart appliances are binding, even if lost one terminal, but also to eliminate the loss of terminal and another terminal of the same model with camouflage smart appliances may operate.

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  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computing Systems (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mobile Radio Communication Systems (AREA)
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Abstract

La présente invention se rapporte au domaine technique de la sécurité de transmission pour des appareils intelligents et, en particulier, à un procédé et à un système de communication par cryptage dynamique utilisant une transmission de segmentation pour une maison intelligente. Des relations de liaison sont établies entre un appareil intelligent et un second terminal mobile et entre l'appareil intelligent et un premier terminal mobile et les relations de liaison sont envoyées à un nuage ; l'appareil intelligent établit de manière séparée un canal de communication avec le second terminal mobile et le premier terminal mobile au moyen du nuage et un canal de communication est établi entre le second terminal mobile et le premier terminal mobile ; le premier terminal mobile émet une demande d'accès à l'appareil intelligent et envoie la demande d'accès au nuage et au second terminal mobile ; le second terminal mobile envoie de manière séparée la demande d'accès à l'appareil intelligent et au nuage après la réception de la demande d'accès ; après la réception séparée des demandes d'accès en provenance du premier terminal mobile et du second terminal mobile, l'appareil intelligent détermine de manière séparée un canal crypté avec le premier terminal mobile et le second terminal mobile par le nuage au moyen du cryptage RSA.
PCT/CN2018/101248 2018-06-14 2018-08-20 Procédé et système de communication par cryptage dynamique utilisant une transmission de segmentation pour une maison intelligente WO2019237502A1 (fr)

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CN201810613268.0A CN108848503B (zh) 2018-06-14 2018-06-14 一种采用分节传输的智能家居动态加密通讯方法及***

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CN106101147A (zh) * 2016-08-12 2016-11-09 北京同余科技有限公司 一种实现智能设备与远程终端动态加密通讯的方法及***

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CN111487887B (zh) * 2020-04-29 2023-11-28 青岛海尔科技有限公司 用于绑定家电设备的方法、装置、用户终端、家电设备及服务器
CN117792668A (zh) * 2023-05-16 2024-03-29 中国标准化研究院 一种基于数字证书管理方法的智慧房屋管理***

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