Legit Sick

Next generation privacy enhancing Medical Certificate Verification

When Medical Certificates are needed - they’re often not standardised, informal and scattered. Certificate.pdf files end up in anonymous in Downloads folders or unknown email inboxes.

Unless requestors of Medical Certificates handle all of this sensitive information properly (which we can’t assume they will), this is bound to result in sensitive information leaking/being seen by people it shouldn’t.

LegitSick allows its users to selectively disclose a cryptographic proof that a Registered Doctor has created a Medical Certificate, and allows it’s client’s to select how much they wish to disclose when they share their certificate.

Repo Structure

• contracts - the midnight.network smart contracts that facilitate LegitSick's core functionality.
• api - an express server that the front end uses to read from midnight testnet.
• client - a web app to facilitate use of the contracts and circuits.

please see each respective folders README.md for instructions on how to install and run.

Core Flow

Here's a sequence diagram of the current flow:

sequenceDiagram
    participant R as Registrar<br/>(Trusted Source)
    participant D as Doctor
    participant C as Client
    participant CR as Certificate<br/>Requestor

    Note over R,D: Step 1: Doctor Registration
    R->>D: Add doctor to register
    activate D
    Note right of D: Doctor is now authorized<br/>to issue certificates
    deactivate D

    Note over D,C: Step 2: Certificate Creation
    C->>D: Request medical certificate
    activate D
    D->>D: Examine client
    D->>C: Create certificate record
    deactivate D
    activate C
    Note right of C: Client now has<br/>certificate on-chain
    deactivate C

    Note over C,CR: Step 3: Selective Disclosure
    CR->>C: Request to view certificate
    activate C
    C->>C: Select which details<br/>to disclose
    C->>CR: Send link with disclosed details
    deactivate C
    Note right of CR: Link contains<br/>selective disclosure proof

    Note over CR: Step 4: View Certificate
    activate CR
    CR->>CR: View disclosed certificate details
    Note right of CR: Requestor sees only<br/>the details client chose<br/>to share
    deactivate CR

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Current UI Status

The UI is under development - here is some screenshots:

Home Page

Patient Dashboard

Doctor Dashboard

Doctor Create Cert

Misc

To run the proof server locally:

docker run -p 6300:6300 midnightnetwork/proof-server -- 'midnight-proof-server --network testnet'