期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2016
卷号：4
期号：2
页码：2202
DOI：10.15680/IJIRCCE.2016.0402079
出版社：S&S Publications
摘要：AttributeBased Encryption (ABE) as the main primitives to protect the patient data stored on a semi-trusted. In ABE scheme,each patient can be identified by label which comprises thepatient attributes. When Patient outsource the sensitive data for sharing on cloud system on cloud systems. Storing the patient records on untrusted storage makes secure data sharing a challenge issue. To keep sensitive user data confidential against untrusted cloud system. Theexisting system usually apply cryptographic methods by disclosing data decryption keys only to authorized user. The main challenges for cryptographic method include simultaneously achieving systemscalability and fine grained data access control ,efficient key or user management ,data security, computational overhead andetc. To address these issues , in this paper we appliedand enforcing access policies based on data attributes andenabling the data owner to delegate most computationintensive tasks to user revocation to untrusted server without disclosing data content to then. We achieve this goal by introducing multi authority attribute based encryption. Our proposed scheme also has salient features of user access privilege confidentiality ,dynamic modification of access policies or file attributes anduser secret key accountability,supports efficient on-demand user or attribute revocation and break-glass access under emergency scenarios
关键词：Cloud computing; Personal health records; data privacy; fine-grained access control; attribute based encryption;multiple authority ABE;user revocation; untrusted storage
