Trust management method based on distributed secret sharing in large-scale Internet of Things scene

Abstract

The invention provides a trust management method based on distributed secret sharing in a large-scale Internet of Things scene, which comprises the following steps that: n participants with own identifiers are initialized on a network, n is equal to t, and the participants jointly negotiate a secret s with a threshold of t by using an initial parameter generation algorithm and reserve own messagesfor recovering the secret; when a new participant exists, the newly added participant selects t bits from the added participants to help to generate a message by using a participant adding algorithm,the secret s and the threshold t are not changed, and in order to prevent leakage, one disturbance needs to be negotiated between every two participants; and when the number of the participants is greater than t, the participants are allowed to exit by using the participant exit algorithm, and the message of each participant is changed after exit, but the secret s and the threshold t are kept unchanged, so that the exit person cannot recover s even if trying to participate in secret recovery.

Description

technical field [0001] The invention relates to the field of network and information security, in particular to a trust management method based on distributed secret sharing in a large-scale Internet of Things scene. Background technique [0002] In the large-scale Internet of Things, the computing resources and power consumption of nodes vary greatly, and their scale and complexity are relatively high. Therefore, the hierarchical mode is a more reasonable management method. In this mode, the status of each top management node is equal, and there is no online third-party manager. Therefore, it is necessary to design a trust management mechanism that does not rely on an online trusted third party, so that each top management node can work together in the Build trust with each other without the involvement of online third parties. [0003] 1) Shamir threshold secret sharing algorithm [0004] In the Shamir threshold secret sharing algorithm, there are n blocks in total. When...

AI Technical Summary

Problems solved by technology

[0015] Although the Shamir scheme can make the number of secret holders higher than the threshold, it relies on a trusted third party, which is equivalent to requiring additional equipment for assistance, and the equipment is more likely to become an attack target. With the establishment of a trusted third party , the c

Images