Research On Attribute-Based Signcryption Scheme For Smart Healthcare

With the rapid development of information technology,human life has undergone great changes.The advancement of the Internet of Things(Io T)has promoted the rise of smart healthcare,which combined with the currently developed technologies such as the Internet,artificial intelligence,and big data and cloud computing,has made the current healthcare service system smarter and safer,and better satisfies the current society’s requirements for it.However,with the application of smart health system and the generation of hundreds of millions of massive data,there are also a series of security problems,such as personal privacy disclosure,data tampering,etc.Patient data in the smart health system contains a lot of private information,and patients hope that their data can only be accessed by authorized users.Attribute-based cryptosystem can guarantee the privacy of patient data and the security of data sharing,and realize one-to-many finegrained access control.In view of the above problems,this thesis takes the attribute-based signcryption algorithm as the core,studies the application of smart health,and designs three related data privacy protection schemes.The specific research work is as follows:(1)An attribute-based signcryption scheme based on cloud computing in medical social networks is proposed.The mobile medical social network provides great convenience for patients to communicate with each other,enhance contact and communication.The combination of cloud computing and attribute-based signcryption technology further improves the fine-grained access control of data,and realizes the confidentiality and integrity of communication data between data owners and data users.At the same time,the cloud server helps data users to decrypt and assist verification,reducing the computational burden of data users.The security of the scheme is proved in the random oracle model.Theoretical analysis and numerical simulation show that the scheme has better advantages in computational efficiency and is more suitable for medical social networks.(2)A lightweight attribute-based signcryption scheme based on cloud-fog assisted in smart healthcare is proposed.With the generation of massive data in smart health systems and the requirements for real-time data processing,traditional cloud computing is no longer suitable for devices with limited computing resources in the Io T.Fog computing has the characteristics of low latency and supporting the mobility of end users because of its powerful computing power.Fog computing is introduced into this scheme to construct a three-layer system architecture of cloud-fog-terminal.Some operations in the signcryption stage and the unsigncryption stage are outsourced to fog nodes,which greatly improves the computational efficiency of the scheme and is more suitable for practical smart health application scenarios.(3)The application of attribute-based signature technology in health monitoring is realized.The aging trend of China’s population is gradually emerging,and the incidence of chronic diseases has increased significantly with the deterioration of body functions.Health management of chronic diseases becomes especially important,but under traditional medical conditions,it is difficult for healthcare professionals to manage chronic diseases in practice.In the body area network environment,patients are monitored in real time through wearable devices and various terminals,and data is collected in real time using wireless sensor networks,so that patients can be monitored in real time and comprehensively,and more targeted health guidance can be provided.In the WBSN,the patient signs offline/online encryption for the information collected by the wearable device,arranges most of the computation operations in the first encryption to the offline encryption stage,ensures the operation efficiency of the subsequent multiple plaintext encryptions,and generates the final ciphertext to be sent to the telemedicine end for diagnosis and analysis,which really puts the health management of the patient into practice.The security proof and numerical simulation show that the scheme is effective and has certain application value.