A popular technology, integrated e-pharma, enables patients, medical practitioners, and pharmacies to combine their systems in order to provide more effective service delivery to their respective audiences. When it comes to IT infrastructure, cloud computing has emerged as a flexible, scalable, and low-cost alternative. The integrated system contains patient data, medical data, and pharmacies, all of which are accessible through a single login. The integration of health-care institutions, pharmaceutical systems, and insurance systems results in sensitive data being accessed and stored in the cloud, and this data must be protected in some way or another. This publication proposes a scalable and strengthened key aggregate cryptosystem (SSKAC) that is capable of providing optimal security for health care data in the integrated e-pharma system while maintaining scalability. This technique addresses the issue of sensitive information leakage by building a secure integrated e-pharma that can save, retrieve, and preserve health and medical prescription data in an encrypted format. This technique is applicable to both personal and commercial information. When encrypting data, the double encryption method with cypher text-id named class is used to increase security by using the same cypher text twice. The key owner possesses a secret hidden key that will be used to extract the private key from many classes on a single computer. The patient is provided with a single aggregate key, which is then utilized in the decryption operation to protect his or her identity. The encryption text is created dynamically using Elliptic curve depending on the amount of data being processed at any one time.