The authors did not obtain permission to use some of the data from Prof.Hiroyuki Isobe,who supervised the reported study in itsearlystages.The concept of cyclo[n]helicenes was initiated by Prof.Hiroyuki Isobe(The Univ...The authors did not obtain permission to use some of the data from Prof.Hiroyuki Isobe,who supervised the reported study in itsearlystages.The concept of cyclo[n]helicenes was initiated by Prof.Hiroyuki Isobe(The University of Tokyo),then at Tohoku University.Specifically,the molecules 1-a,1-t,2-c,and 2-r were synthesized by Yong Yang who was employed with the funding of Professor Isobe,and the crystal data,CCDC 2306989-2306991 and 2306993,were obtained and analyzed by Sota Sato who was working in Professor Isobe’s group.The necessary expenses for these parts of the work were covered by JST ERATO(JPMJER1301,H.I.).The concept of cyclo[n]helicenes was initiated years ago by Prof.Isobe,when Dr.Yong Yang was a postdoc and Dr.Sota Sata was also a member of the group.The starting materials used in this work,[4]CH and[5]CH,were synthesized by Dr.Yang and structurally characterized by Dr.Sato in the group.展开更多
Permission delegation has become a new way for data sharing by delegating the authorized permission to other users.A flexible authorization model with strict access control policies is promising for electronic health ...Permission delegation has become a new way for data sharing by delegating the authorized permission to other users.A flexible authorization model with strict access control policies is promising for electronic health record(EHR)sharing with security.In this paper,a blockchain-based multi-hop permission delegation scheme with controllable delegation depth for EHR sharing has been presented.We use the interplanetary file system(IPFS)for storing the original EHRs.Smart contracts and proxy re-encryption technology are implemented for permission delegation.In order to ensure data security,we use attribute-based encryption to provide fine-grained access control.Additionally,blockchain is used to achieve traceability and immutability.We deploy smart contracts so that the delegation depth can be set by delegators.Security analysis of the proposed protocol shows that our solution meets the designed goals.Finally,we evaluate the proposed algorithm and implement the scheme on the Ethereum test chain.Our scheme outperforms the competition in terms of performance,according to the results of our experiments.展开更多
文摘The authors did not obtain permission to use some of the data from Prof.Hiroyuki Isobe,who supervised the reported study in itsearlystages.The concept of cyclo[n]helicenes was initiated by Prof.Hiroyuki Isobe(The University of Tokyo),then at Tohoku University.Specifically,the molecules 1-a,1-t,2-c,and 2-r were synthesized by Yong Yang who was employed with the funding of Professor Isobe,and the crystal data,CCDC 2306989-2306991 and 2306993,were obtained and analyzed by Sota Sato who was working in Professor Isobe’s group.The necessary expenses for these parts of the work were covered by JST ERATO(JPMJER1301,H.I.).The concept of cyclo[n]helicenes was initiated years ago by Prof.Isobe,when Dr.Yong Yang was a postdoc and Dr.Sota Sata was also a member of the group.The starting materials used in this work,[4]CH and[5]CH,were synthesized by Dr.Yang and structurally characterized by Dr.Sato in the group.
基金supported by the National Natural Science Foundation of China(No.62072005)Natural Science Foundation of Anhui Province,China(No.2108085Y22)Anhui Provincial Engineering Laboratory on Information Fusion and Control of Intelligent Rabot,China(No.IFCIR2020008).
文摘Permission delegation has become a new way for data sharing by delegating the authorized permission to other users.A flexible authorization model with strict access control policies is promising for electronic health record(EHR)sharing with security.In this paper,a blockchain-based multi-hop permission delegation scheme with controllable delegation depth for EHR sharing has been presented.We use the interplanetary file system(IPFS)for storing the original EHRs.Smart contracts and proxy re-encryption technology are implemented for permission delegation.In order to ensure data security,we use attribute-based encryption to provide fine-grained access control.Additionally,blockchain is used to achieve traceability and immutability.We deploy smart contracts so that the delegation depth can be set by delegators.Security analysis of the proposed protocol shows that our solution meets the designed goals.Finally,we evaluate the proposed algorithm and implement the scheme on the Ethereum test chain.Our scheme outperforms the competition in terms of performance,according to the results of our experiments.
