Lattice based Ring Signature Scheme for Secure Cloud-based EMR Sharing
Abstract
Advances in medical science and technology continue to drive the development of e-healthcare, with Electronic Medical Records (EMRs) consisting of medical information such as patient consultation records and bodily data being gradually popularized in the form of cloud sharing. The sharing of EMR effectively enhances the effectiveness and reliability of healthcare services. However, the highly sensitive EMRs are susceptible to tampering and misuse during the EMR sharing, which poses a tremendous threat to patients’ privacy and the security of e-health. Further, EMRs are extremely vulnerable to quantum computing attacks during the process of sharing in cloud, which will be the most significant bottleneck in the advancement of e-healthcare systems. To tackle the foregoing issues, we present a lattice-based ring signature scheme for secure EMR sharing on the cloud. To begin with, we implement EMR sharing with medical cloud. Then, we set a lattice-based ring signature scheme to ensure user anonymity, EMR and signature unforgeability, while resisting quantum attacks. Further, we require all EMR-related users to perform multiparty confirmation signatures on the EMR. In conlusion, the security analysis and performance evaluation indicate that our scheme guarantees correctness, anonymity, and unforgeability, while outperforming other existing schemes.
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