A consortium of hospitals and research institutions is devel…
A consortium of hospitals and research institutions is developing a decentralized identity management (DID) system to enable patients to control access to their electronic health records (EHRs). This system uses blockchain technology to store and verify patient identities and access permissions. Patients can grant or revoke access to their EHRs to healthcare providers, researchers, and other authorized entities. Key features of the system include: DID Generation: Patients generate their own DIDs, stored on a permissioned blockchain. Access Control: Patients define access policies using smart contracts, specifying who can access which parts of their EHRs. Data Sharing: Authorized entities can request access to specific EHR data, which is granted or denied based on the patient’s policies. Data Audit: All access requests and data-sharing events are recorded on the blockchain for auditing purposes. Off-chain Storage: The actual EHR data is stored off-chain, with encrypted links to the blockchain. Considering the specific design and security requirements of the decentralized identity management (DID) system for healthcare data, which of the following statements BEST synthesizes the MOST critical challenge in applying the STRIDE threat modeling methodology in this context, and why?