A Novel GLS Consensus Algorithm for Alliance Chain in Edge Computing Environment

Edge computing devices are widely deployed.An important issue that arises is in that these devices suffer from security attacks.To deal with it,we turn to the blockchain technologies.The note in the alliance chain need rules to limit write permissions.Alliance chain can provide security management functions,using these functions to meet the management between the members,certification,authorization,monitoring and auditing.This article mainly analyzes some requirements realization which applies to the alliance chain,and introduces a new consensus algorithm,generalized Legendre sequence(GLS)consensus algorithm,for alliance chain.GLS algorithms inherit the recognition and verification efficiency of binary sequence ciphers in computer communication and can solve a large number of nodes verification of key distribution issues.In the alliance chain,GLS consensus algorithm can complete node address hiding,automatic task sorting,task automatic grouping,task node scope confirmation,task address binding and stamp timestamp.Moreover,the GLS consensus algorithm increases the difficulty of network malicious attack.

Consensus algorithm for medical data storage and sharing based on master–slave multi-chain of alliance chain

The safe storage and sharing of medical data have promoted the development of the public medical field.At the same time,blockchain technology guarantees the safe storage and sharing of medical data.However,the consensus algorithm in the current medical blockchain cannot meet the requirements of low delay and high throughput in the large-scale network,and the identity of the primary node is exposed and vulnerable to attack.Therefore,this paper proposes an efficient consensus algorithm for medical data storage and sharing based on a master–slave multi-chain of alliance chain(ECA_MDSS).Firstly,institutional nodes in the healthcare alliance chain are clustered according to geographical location and medical system structure to form a multi-zones network.The system adopts master–slave multi-chain architecture to ensure security,and each zone processes transactions in parallel to improve consensus efficiency.Secondly,the aggregation signature is used to improve the practical Byzantine fault-tolerant(PBFT)consensus to reduce the communication interaction of consensus in each zone.Finally,an efficient ring signature is used to ensure the anonymity and privacy of the primary node in each zone and to prevent adaptive attacks.Meanwhile,a trust model is introduced to evaluate the trust degree of the node to reduce the evil done by malicious nodes.The experimental results show that ECA_MDSS can effectively reduce communication overhead and consensus delay,improve transaction throughput,and enhance system scalability.

拜登政府的关键矿产战略

Critical minerals closely relate to the economic,environmental,defense,and intergenerational resources security of the US and are therefore infuential in US economic recovery,industrial restructuring,scientifc and technological competition,national security,and strategy toward China.Since the Obama administration,the US has been increasingly focusing on its critical minerals strategy,as illustrated by its issuance of a series of related laws and executive orders and its eforts to advance the reform of relevant agencies.The Biden administration has increased the emphasis on supply chains for critical minerals that are vital to green and lowcarbon development and pushed for more coordination among government departments and agencies.Perceiving China as a competitor to the US,Joe Biden has announced large-scale investment and procurement measures at home and promoted institutional building in concerned sectors as part of efforts to counter China’s competitive advantages.Simultaneously,he has been developing a security strategy of and advocating supply chain alliances for critical minerals based on US allies.The critical minerals strategy of the Biden administration will greatly influence the stable development of China’s supply chains.In response,China should focus on forging a new type of international relations,with an aim to promote global resource governance and ensure the sustained security of its critical mineral supplies.