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Modified Elliptic Curve Cryptography Model for Personal Health Record Sharing in Cloud with Trust Valuation


ChudamanDevidasrao Sukte, Dr. Emmanuel. M and Dr. Ratnadeep R. Deshmukh


Vol. 22  No. 1  pp. 593-601


In this research work, a novel SSPHR (Secure Sharing PHR) methodology based on Modified Elliptic Curve Cryptography (MEEC) with Trust Evaluation based RE-encryption key is introduced for securely sharing the Personal Health Records (PHR) of the patients via cloud. The patients being the owners of his/her PHRs initially register within the cloud, and upload their PHR onto the cloud. Before uploading the PHR documents, the owner (patients) encrypts the data using a newly proposed Modified Elliptic Curve Cryptography (MEEC) model. Whenever, a cloud user (may be a doctor, insurance person, family members, pharmacist or research scholar) request for the access of the patients’ encrypted PHR to edit or view his/her records, the owner (patient) alone can grants permission. Based on the functionality (role played in the society) of the user, the PHR owner grants certain level of access only after re-encrypting it based on the trust evaluation. This level of access granted to various categories of users is de-fined in the Access Control List (ACL) by the PHR owner. More particularly, the PHR user performs aTrust Evaluation to verify whether the user is a direct user (already existing users) or indirect user (Authorized sources like friend’s company). This proposed model permits the PHR owners to exercise complete control over their PHR.


PHR; Cloud Storage; Secure Sharing; Modified Elliptic Curve Cryptography (MEEC); Trusted Evaluation based RE-encryption key