Efficient File Sharing in Electronic Health Records

The issue of handling electronic health records have become paramount interest to the practitioners and security community, due to their sensitivity. In this paper, we propose a framework that enables medical practitioners to securely communicate among themselves to discuss health matters, and the patients can be rest assured that the information will only be made available to eligible medical practitioners. Specifically, we construct a new cryptographic primitive to enable File Sharing in Electronic Health Records (FSEHR). This primitive enables doctors to read the information sent by the hospital, or by any other individuals (such as patients' health records), when the doctors have their 'license' validated by that given hospital. We construct such a cryptographic primitive and capture its security requirements in a set of security models. Subsequently, we present a concrete scheme, which is proven selectively chosen-ciphertext security (CCA-1) secure under the Decisional Bilinear Diffie-Hellman Exponent (DBDHE) assumption and fully collusion resistant.