With the popularity of the Internet of Vehicles(IoV),a large amount of data is being generated every day.How to securely share data between the IoV operator and various value-added service providers becomes one of the...With the popularity of the Internet of Vehicles(IoV),a large amount of data is being generated every day.How to securely share data between the IoV operator and various value-added service providers becomes one of the critical issues.Due to its flexible and efficient fine-grained access control feature,Ciphertext-Policy Attribute-Based Encryption(CP-ABE)is suitable for data sharing in IoV.However,there are many flaws in most existing CP-ABE schemes,such as attribute privacy leakage and key misuse.This paper proposes a Traceable and Revocable CP-ABE-based Data Sharing with Partially hidden policy for IoV(TRE-DSP).A partially hidden access structure is adopted to hide sensitive user attribute values,and attribute categories are sent along with the ciphertext to effectively avoid privacy exposure.In addition,key tracking and malicious user revocation are introduced with broadcast encryption to prevent key misuse.Since the main computation task is outsourced to the cloud,the burden of the user side is relatively low.Analysis of security and performance demonstrates that TRE-DSP is more secure and practical for data sharing in IoV.展开更多
Vaccination has become an integral part of public health,since an increase in overall vaccination in a given population contributes to a decline in infectious diseases and mortality.Vaccination also contributes to a l...Vaccination has become an integral part of public health,since an increase in overall vaccination in a given population contributes to a decline in infectious diseases and mortality.Vaccination also contributes to a lower rate of infection even for nonvaccinators due to herd immunity((Brisson and Edmunds,2002)).In this work we model human decision-making(with respect to a vaccination program in a single-payer health care provider country)using a leader-follower game framework.We then extend our model to a discrete dynamic game,where time passing is modelled by risk perception changes among population groups considering whether or not to vaccinate.The risk perception changes are encapsulated by probability transition matrices.We assume that the singlepayer provider has a given fixed budget which would not be sufficient to cover 100%of a new vaccine for the entire population.To increase the potential coverage,we propose the introduction of a partial vaccine adoption policy,whereby an individual would pay a portion of the vaccine price and the single payer would support the rest for the entire population.We show how this policy,together with changes in risk perceptions regarding vaccination,impact the strategic decisions of individuals in each group,the policy cost under budgetary constraints and,ultimately,how it impacts the overall uptake of the vaccine in the entire population.展开更多
基金supported by the National Natural Science Foundation of China(No.62272076)。
文摘With the popularity of the Internet of Vehicles(IoV),a large amount of data is being generated every day.How to securely share data between the IoV operator and various value-added service providers becomes one of the critical issues.Due to its flexible and efficient fine-grained access control feature,Ciphertext-Policy Attribute-Based Encryption(CP-ABE)is suitable for data sharing in IoV.However,there are many flaws in most existing CP-ABE schemes,such as attribute privacy leakage and key misuse.This paper proposes a Traceable and Revocable CP-ABE-based Data Sharing with Partially hidden policy for IoV(TRE-DSP).A partially hidden access structure is adopted to hide sensitive user attribute values,and attribute categories are sent along with the ciphertext to effectively avoid privacy exposure.In addition,key tracking and malicious user revocation are introduced with broadcast encryption to prevent key misuse.Since the main computation task is outsourced to the cloud,the burden of the user side is relatively low.Analysis of security and performance demonstrates that TRE-DSP is more secure and practical for data sharing in IoV.
基金I would like to acknowledge the Natural Sciences and Engineering Research Council of Canada Discovery Grant program,with grant number 400684This grant supported the work of the first and second authors.
文摘Vaccination has become an integral part of public health,since an increase in overall vaccination in a given population contributes to a decline in infectious diseases and mortality.Vaccination also contributes to a lower rate of infection even for nonvaccinators due to herd immunity((Brisson and Edmunds,2002)).In this work we model human decision-making(with respect to a vaccination program in a single-payer health care provider country)using a leader-follower game framework.We then extend our model to a discrete dynamic game,where time passing is modelled by risk perception changes among population groups considering whether or not to vaccinate.The risk perception changes are encapsulated by probability transition matrices.We assume that the singlepayer provider has a given fixed budget which would not be sufficient to cover 100%of a new vaccine for the entire population.To increase the potential coverage,we propose the introduction of a partial vaccine adoption policy,whereby an individual would pay a portion of the vaccine price and the single payer would support the rest for the entire population.We show how this policy,together with changes in risk perceptions regarding vaccination,impact the strategic decisions of individuals in each group,the policy cost under budgetary constraints and,ultimately,how it impacts the overall uptake of the vaccine in the entire population.
