A Study on Access Structure Management of CP-ABTD Based Blockchain for Medical Information Monitoring System

With the advancement of ICT technology, the use of systems capable of organizing, sorting and utilizing numerous information generated in seconds was essential. This is not only information providers but also system stability, mobile-based technology, cloud system, etc. are presented for smooth use by consumers. However, the medical information handled by the service can violate the privacy of individuals. Therefore, the introduction of security technology such as encryption is necessary. Personal information must be made available only to users with access rights. For that, delegation of access rights is required from the data constructor. Also, when the authority is lost, it must be able to deprive the access right. These problems can be improved to attribute based encryption. In this paper, user attribute based encryption which can, delegate and withdraw access right to be used in medical information monitoring system is applied. In order to manage this efficiently, it is based on the network of Fog Computing environment. Authorization authentication system uses block chain method.