Trust Attestation Mechanism for the Sensing Layer Nodes of Internet of Things

The main function of Internet of Things is to collect and transmit data.At present,the data transmission in Internet of Things lacks effective trust attestation mechanism and trust traceability mechanism of data source.To solve the above problems,a trust attestation mechanism for sensing layer nodes is presented.First a trusted group is established,and the node which is going to join the group needs to attest its identity and key attributes to the higher level node.Then the dynamic trust measurement value of the node can be obtained by measuring the node data transmission behavior.Finally the node encapsulates the key attributes and trust measurement value to use short message group signature to attest its trust to the challenger.This mechanism can measure the data sending and receiving behaviors of sensing nodes and track the data source,and it does not expose the privacy information of nodes and the sensing nodes can be traced effectively.The trust measurement for sensing nodes and verification is applicable to Internet of Things and the simulation experiment shows the trust attestation mechanism is flexible,practical and efficient.Besides,it can accurately and quickly identify the malicious nodes at the same time.The impact on the system performance is negligible.

Multikernel:Operating system solution to generalized functional safety

With the trend of digitalization,intelligence,and networking sweeping the world,functional safety and cyber security are increasingly intertwined and overlapped,evolving into the issue of generalized functional safety.Traditional system reliability technology and network defense technology cannot provide quantifiable design implementation theories and methods.As the cornerstone of software systems,operating systems in particular are in need of efficient safety assurance.The DHR architecture is a mature and comprehensive solution,and it is necessary to implement an OS-level DHR architecture,for which the multi-kernel operating system is a good carrier.The multi-kernel operating system takes the kernel as the processing scenario element and constructs redundancy,heterogeneity,and dynamism on the kernel,so it has the generalized robustness of the DHR architecture.This article analyzes the significance and requirements of OS-level DHR architecture,and systematically explains how the multi-kernel operating system responds to the requirements of OS-level DHR architecture by analyzing the technical routes of multi-kernel operating systems and develops an operating system solution idea for the generalized functionally safety.

Towards building a firm metaverse security base

The Metaverse is a significant field that is currently receiving considerable attention from both the industry and academia.The transformation of the Metaverse from science fiction to reality is being actively promoted by technology,industry,and capital.However,the development of the Metaverse is still in its early stages,and the system architecture and theoretical technology of the Metaverse are not yet mature.This paper provides a comprehensive analysis of the Metaverse and summarizes its holographic,omnipotent,multidimensional,and multifaceted characteristics.The development of the Metaverse is founded on the relevant infrastructure,and we elaborate on the primary components of the Metaverse infrastructure.Furthermore,we systematically summarize the security risks inherent in the Metaverse infrastructure.Based on this,we propose utilizing the system security technology concept to guide the construction of a Metaverse security protection system from various perspectives at each level of computing,cloud,network,digital assets,and terminals,in order to construct a secure foundation for addressing the Metaverse’s security risks and challenges.