Vehicle ad-hoc networks have developed rapidly these years,whose security and privacy issues are always concerned widely.In spite of a remarkable research on their security solutions,but in which there still lacks con...Vehicle ad-hoc networks have developed rapidly these years,whose security and privacy issues are always concerned widely.In spite of a remarkable research on their security solutions,but in which there still lacks considerations on how to secure vehicleto-vehicle communications,particularly when infrastructure is unavailable.In this paper,we propose a lightweight certificateless and oneround key agreement scheme without pairing,and further prove the security of the proposed scheme in the random oracle model.The proposed scheme is expected to not only resist known attacks with less computation cost,but also as an efficient way to relieve the workload of vehicle-to-vehicle authentication,especially in no available infrastructure circumstance.A comprehensive evaluation,including security analysis,efficiency analysis and simulation evaluation,is presented to confirm the security and feasibility of the proposed scheme.展开更多
Transient electronics,which can be controllably broken down with zero environmental impact,hold significant potential in implantable devices,hardware security,and disposable sensors.While miniaturization is essential ...Transient electronics,which can be controllably broken down with zero environmental impact,hold significant potential in implantable devices,hardware security,and disposable sensors.While miniaturization is essential for enhancing device performance,increasing integration density,and enabling new applications,degradable materials often face challenges with conventional microfabrication processes like lithography due to their sensitivity to heat and solvents.In this paper,we present a UV photodetector(PD)with micro-scale patterning,fabricated using a novel solvent-free material patterning method.The PD,consisting of molybdenum(Mo)as the electrode,zinc oxide(ZnO)as the photoactive material,and polyvinyl alcohol(PVA)as the substrate,can be dissolved in deionized(DI)water,leaving behind non-toxic byproducts.The device exhibits high responsivity over 50 A/W and an obvious response to varying sunlight intensities,demonstrating its potential for temporary,eco-friendly UV sensing applications.Additionally,we demonstrated that the photoresist used in the solvent-free material patterning method can be reused for subsequent fabrication while maintaining good registration,enhancing efficiency and reducing material waste.This approach provides a scalable and high-efficiency microfabrication strategy for integrating functional materials into unconventional platforms,offering broader applicability in next-generation transient,biodegradable,and flexible sensor technologies.展开更多
基金This work was supported in part by the National Natural Science Foundation of China under Grant No.61170217,61272469,61303212,61332019,and Grant No.U1135004,and by the Fundamental Research Founds for National University,China University of Geosciences
文摘Vehicle ad-hoc networks have developed rapidly these years,whose security and privacy issues are always concerned widely.In spite of a remarkable research on their security solutions,but in which there still lacks considerations on how to secure vehicleto-vehicle communications,particularly when infrastructure is unavailable.In this paper,we propose a lightweight certificateless and oneround key agreement scheme without pairing,and further prove the security of the proposed scheme in the random oracle model.The proposed scheme is expected to not only resist known attacks with less computation cost,but also as an efficient way to relieve the workload of vehicle-to-vehicle authentication,especially in no available infrastructure circumstance.A comprehensive evaluation,including security analysis,efficiency analysis and simulation evaluation,is presented to confirm the security and feasibility of the proposed scheme.
基金supported by the National Natural Science Foundation of China(No.52375580)the Guangdong Basic and Applied Basic Research Foundation(No.2024A1515011397)+2 种基金the Department of Education of Guangdong Province(No.2023ZDZX1036)the Guangzhou-HKUST(GZ)Joint Funding Program(No.2023A03J0688)the Guangzhou Basic and Applied Basic Research Scheme(No.2024A04J6466).
文摘Transient electronics,which can be controllably broken down with zero environmental impact,hold significant potential in implantable devices,hardware security,and disposable sensors.While miniaturization is essential for enhancing device performance,increasing integration density,and enabling new applications,degradable materials often face challenges with conventional microfabrication processes like lithography due to their sensitivity to heat and solvents.In this paper,we present a UV photodetector(PD)with micro-scale patterning,fabricated using a novel solvent-free material patterning method.The PD,consisting of molybdenum(Mo)as the electrode,zinc oxide(ZnO)as the photoactive material,and polyvinyl alcohol(PVA)as the substrate,can be dissolved in deionized(DI)water,leaving behind non-toxic byproducts.The device exhibits high responsivity over 50 A/W and an obvious response to varying sunlight intensities,demonstrating its potential for temporary,eco-friendly UV sensing applications.Additionally,we demonstrated that the photoresist used in the solvent-free material patterning method can be reused for subsequent fabrication while maintaining good registration,enhancing efficiency and reducing material waste.This approach provides a scalable and high-efficiency microfabrication strategy for integrating functional materials into unconventional platforms,offering broader applicability in next-generation transient,biodegradable,and flexible sensor technologies.
