Authors : Vemula Sai; Medikonda Jhoshna; Prasanna Guduru; R. J. Ramasree

Volume/Issue : Volume 11 - 2026, Issue 3 - March

Google Scholar : https://tinyurl.com/y4j8e28k

Scribd : https://tinyurl.com/ypre3jwd

DOI : https://doi.org/10.38124/ijisrt/26mar1753

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Abstract : In the proposed hybrid encryption scheme, Blowfish is utilised for encrypting the actual medical data because of its fast and computationally efficient symmetric encryption mechanism. Symmetric encryption algorithms require only one secret key for both encryption and decryption purposes, making them highly efficient for processing large amounts of data like patient records, reports, and medical data. Blowfish, functioning in the CBC mode, ensures the secure conversion of the plaintext to ciphertext with high performance and low processing cost. Conversely, RSA is utilized for encrypting and securely transmitting the Blowfish secret key. As RSA is an asymmetric encryption algorithm, it requires a public-private key pair, thereby completely eliminating the key distribution issue often encountered in symmetric encryption algorithms. By encrypting the symmetric key with RSA using secure padding like PKCS#1 OAEP, the proposed scheme ensures that only the intended recipient can decrypt the secret key. This hybrid encryption scheme effectively leverages the speed of symmetric encryption algorithms with the secure key exchange mechanism of asymmetric cryptography, thereby providing both efficiency and security.

Keywords : Hybrid Cryptography, Medical Data Security, Dual-Layer Encryption, Role-Based Access Control, Data Confidentiality, Integrity Verification, Secure Healthcare Systems.

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