Research On Internet Of Things Security Based On Access Control Encryption

With the innovative development of the Internet of Things(Io T),the ways of social life and the forms of traditional industries have dramatically changed.Io T technology is the foundation stone of new patterns and services,and has set off a new wave of rapid development of society and industry.However,mass smart devices are connected to the Io T with limited resources and without security protection,which has caused a series of malicious attacks on data security and privacy.Obviously,security problems have become the major barrier to the widespread deployment of the Io T.Cryptography,an important technology for data security and privacy protection,can be used to guarantee the security of data transmission in practical applications and avoid the disclosure of user privacy.Therefore,it is important doubtlessly both in theory and in practice to research on the cryptography technology for Io T.To solve the problem of data security in smart home and enrich the access control mode for mobile crowdsensing network,an effective data transmission scheme and a secure access control scheme are designed for smart home and mobile crowdsensing respectively,by utilizing the access control encryption and group signature.The proposed schemes can ensure the secure transmission of data and the fine-grained access control of users.The main works of this thesis are as follows:① Based on lightweight access control encryption,we propose an effective secure data transmission scheme for the smart home.To meet the data security demand of smart home and solve the problem of high bandwidth consumption of existing access control encryption,we propose a secure data transmission scheme based on lightweight access control encryption with compact ciphertexts.The proposed scheme not only ensures the security of data in transit,but also reduce the communication overhead.Meanwhile,the formal security proofs and experimental evaluations show that our scheme is more practical than most existing schemes.② Based on anonymous access control encryption,we propose an access control scheme for mobile crowdsensing network.To meet the flexible access control requirement of mobile crowdsensing network and provide stronger privacy protection,we propose an access control scheme based on an anonymous access control encryption which combines the previous access control encryption with an effective group signature scheme.The proposed scheme not only realizes the bilateral access control policy(read and write),but also supports the user anonymity and the illegal user traceability.The security and performance analysis demonstrate that our scheme further improves the security of mobile crowdsensing system.