Encryption method applied to MQTT-SN protocol

Abstract

The invention relates to an encryption method applied to a MQTT-SN protocol, and relates to the field of communication. The method employs a harsh algorithm and ciphertext-policy attribute-based encryption method, so that a publishing terminal, an agent server and one or a plurality of subscription terminals can complete encrypted communication. The method herein includes the following steps: an agent server verifying the identity of a publishing / subscription terminal, performing registration of the publishing / subscription terminal, and generating a system common parameter; the publishing terminal encrypting a plaintext load by using the ciphertext-policy attribute-based encryption method; the publishing terminal transmitting the encrypted load to the agent server, the agent server forwarding the encrypted load to one or a plurality of subscription terminals; and the subscription terminal applying for a secrete key from the agent server, decrypting the encrypted load, obtaining a plaintext. According to the invention, the method can implement identity verification of a MQTT-SN protocol publishing / subscription terminal, data integrity verification, and data confidentiality protection, and better addresses the safety issues faced by the MQTT-SN protocol in terminals of wireless sensor network applications.

Description

Technical field [0001] The invention belongs to the communication field, and specifically relates to an encryption method suitable for the MQTT-SN protocol. Background technique [0002] The MQTT-SN (Message Queuing Telemetry Transport for Sensor Networks) protocol is a lightweight proxy-based publish / subscribe messaging protocol designed by IBM for wireless sensor networks. Its design purpose is mainly to provide an open, streamlined, lightweight and easy-to-implement communication method for a large number of wireless sensor networks with limited computing power and working in low-bandwidth, unreliable networks. It has the obvious characteristics of being suitable for wireless sensor networks, such as low protocol consumption, light weight, and low power consumption, and has been widely used in environments with limited computing and storage resources such as wireless sensors. [0003] The MQTT-SN protocol data encryption process involves three types of entities: publishing end,...

AI Technical Summary

Problems solved by technology

[0008] (1) Authentication problem: the authentication of the publisher and the subscriber has not been implemented, and the legitimacy of the information source cannot be safely guaranteed

[0009] (2) Data confidentiality problem: It cannot be guaranteed that the payload published by the publisher is invisible to the outside world

[0010] (3) Data integrity problem: there is no guarantee that the published message will not be modified by an unauthenticated, especially malicious node

Images