Online Medical System Using ElGamal

Cost-effective and secure sharing of individual health records is now possible through the use of cloud services in the healthcare sector. Storing sensitive health information in the cloud raises concerns about its security, necessitating an assessment of the best means of protecting this information. As a result, we propose a strategy to facilitate the exchange of private health data in the cloud, which we refer to as Enhanced Security Services. These systems ensure the confidentiality of PHRs while also protecting the patient’s right to exercise autonomy over their own health information. Patients encrypt their data and store it on remote servers, allowing multiple parties access to specific sections of their medical records. Key pairs and re-encryption keys are initially generated and stored on a semi-trusted proxy and re-encryption server (SRS). This approach is safe because it uses both forward and backward access control and guards against insider threats. Using High-Level Petri Nets, we formally investigate and verify the efficacy of this strategy (HLPN). An evaluation of the personal health data methodology’s efficiency suggests it can exchange data safely via the cloud.