Privacy and security of sharing referral medical record for health care system

Sharing of health information become daily routines in which hospitals and clinics often refer patients to specialists because of their limited facilities, services, and number of specialist physicians. This paper proposed secure design for sharing referral medical record using HIBE (Hierarchical ID-Based Encryption), that focused on the ability of sharing information and ensuring privacy of referral medical record. Our proposed system is able to secure referral medical record from third parties and only the referral physician that can access the referral medical record. The result of performance testing shows that the average percentage increase from length of cipher text is 75%, with the smallest percentage increase is 22.80% and the largest is 236%.