Low-power-consumption communication method and device for safety group of internet of things

Abstract

The invention discloses a low-power-consumption communication method and device for a safety group of the internet of things. The low-power-consumption communication method includes: consultation of a group secret key of the safety group of the internet of things is performed based on a hash function and a secret key tree, each group member in the safety group of the internet of things obtains the sharing group secret key; and all the group members in the safety group of the internet of things communicate on the basis of the sharing group secret key and manage the group secret key. According to the low-power-consumption communication method and device for the safety group of the internet of things, the hash function and the secret key tree are combined so that consultation communication of the group secret key can be achieved, and fast and efficient group secret key updating can be ensured; and the blacklist technology is adopted, abnormal node detection based on the voting mechanism is designed, and therefore flexibility and safety of communication of safety group of the internet of things are improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a low-power-consumption Internet of Things security group communication method and device. Background technique [0002] With the increasing popularity of the research and application of the Internet of Things in various fields, the security group communication of the Internet of Things has gradually become an important research hotspot. An Internet of Things network is connected to each other and information is shared. Network nodes are usually scattered in various locations. These nodes form a network by themselves, collecting, transmitting, and merging information to provide "whatever you need" services. Because the node network in the same area is likely to carry out group communication (multicast), however, these group communication requires security technical support as a group communication guarantee. From the existing related technologies, the group key ma...

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Problems solved by technology

From the existing related technologies, the group key management framework adopted by most security group communications is relatively expensive, lacks flexibility, and cannot effectively prevent the destruction of malicious nodes within the group. The analysis is as follows:

[0003] (1) The overhead of key algorithms based on Diffie-Hellman algorithm and identity ID is relatively large. For example, the Group D-H protocol requires (n+1) exponential operations. For ordinary sensors, it is difficult to bear the computational overhead of using this algorithm

[0004] (2) At present, most of the key management algorithms are based on an assumption that the distribution of nodes is static after the distribution. Once the topological structure of the Internet of Things changes, such as node movement, group merging, intra-group splitting, and inter-group reorganizatio

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