Abstract
Healthcare industry is continuously evolving as new technologies are being integrated in the existing healthcare infrastructure. Privacy preservation provides one of the key role from security perspective in an electronic healthcare data security. Due to continuously emerging threats, a comprehensive security framework that should provide strong patient anonymity level (considering both patient's identity and patient's data), anonymized data searching and successful correlation of PHR for medical research is difficult to formulize. In this paper, some previous security frameworks were analyzed and their flaws were identified. Also it proposed an enhancement to the existing solutions based on a careful analysis of their shortcomings.