On demand security for Personal Health Record in cloud computing

Cloud computing is used broadly in several services that maintain Personal Health Record (PHR). It is a patient health-centric model for data exchange in cloud. Personal Health Record (PHR) is often keeping in a third party server i.e. cloud server. The major problems raised in existing approaches are fine-grained access, cryptographically access control, measurability in key management and effective on-demand user revocation. We would like to provide the secure sharing of patient health information in PHR data. This paper predominantly considers the multi-owner scenario and divides the user in PHR system into multiple security domains that greatly reduces the key management issues. A high degree of patient privacy is enriched at the same time by developing Multi-Authority Attribute based mostly cryptography (MA-ABE). We have to improve the security of Personal Health information and set access privileges for every PHR data. Before taking a key to decipher the PHR record in multiple owner scenarios it must raise some security queries on PHR owner.