Wireless network equipment upgrading program and communication data encryption method

Abstract

The invention discloses a wireless network equipment upgrading program and communication data encryption method. Through simple grouping, XOR, shifting, interpolation processing and an SHA256 hash algorithm, encryption of an embedded upgrading program is realized; and high-reliability encryption of data blocks of the upgrading program is realized by using a cryptographic digest algorithm. When thegrouping, the XOR, the shifting and the interpolation processing are carried out in a program data encryption process each time, numerous random numbers are used; the random numbers and other key data form a cryptographic digest; a ciphertext of the upgrading program can be decrypted only through the cryptographic digest; and encrypted ciphertexts and cryptographic digests generated by encryptingthe same data in different encryption processing devices at different moments are different. According to the method, relatively few code spaces of a CPU of wireless network equipment are occupied; the requirement on the operation speed of the CPU is relatively low; the encryption of the upgrading program and the communication data can be realized by adopting the cheap CPU; and the security of equipment communication and the integrity of the data are ensured.

Description

technical field [0001] The invention relates to the technical field of data encryption, especially the field of the Internet of Things, wireless sensor networks, and embedded systems, and in particular to a method for upgrading programs of wireless network equipment and encrypting communication data. Background technique [0002] In the Internet of Things, wireless sensor networks and embedded systems, each device will be embedded with an embedded CPU processor to execute the embedded program written by the designer to realize the automation and intelligence of the device and system. In the process of program writing, it is inevitable that program code errors will cause problems such as abnormal operation of the device and the need for new functions to be added to the device. In order to solve such problems conveniently, designers usually design an online upgrade mechanism to facilitate program upgrades. Update, but at present, almost all online upgrades use plain text to tr...

AI Technical Summary

Problems solved by technology

[0002] In the Internet of Things, wireless sensor networks and embedded systems, each device will be embedded with an embedded CPU processor to execute the embedded program written by the designer to realize the automation and intelligence of the device and system. In the process of program writing, it is inevitable that program code errors will cause problems such as abnormal operation of the device and the need for new functions to be added to the device. In order to solve such problems conveniently, designers usually design an online upgrade mechanism to facilitate program upgrades. Update, but at present, almost all online upgrades use plain text to transmit, store, and upgrade binary programs, which are very easy to be obtained and directed by third parties, resulting in products that product designers spend a lot of manpower, material resources, and time on research and development. , was maliciously plagiarized by a third party shortly after its launch, causing huge losses to product design manufacturers

[0003] In the fields of the Internet of Things and wireless sensor networks, due to the openness of wireless communication signals, it is very easy for a third party to intercept and analyze the communication data through the transmission of plaintext communication data through wireless signals, resulting in the leakage of key data in the wireless network. There will be illegal intruders pretending to invade the wireless network, resulting in abnormal wireless network communication, in order to achieve the illegal purpose of malicious intruders

[0004] Although there are currently a small number of products that encrypt the upgrade program and communication data to ensure the security of the equipment, if the internationally used symmetric encryption such as DES and AES is used in the Internet of Things, wireless sensor networks and embedded systems Algorithm for data encryption, but limited by the code space of the embedded CPU processor and the computing speed of the processor, its encryption and decryption efficiency is very low; if a simple single encryption technology is used, it is easy to be cracked by a malicious third party, thereby achieving Not for the purpose of encryption

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