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Continuum: Background Checker with Zero-Knowledge Proof

Continuum: Background Checker with Zero-Knowledge Proof

This is the slide of my final project at Zero-Knowledge University https://zku.one
Continuum is a background checker using Zero-Knowledge Proof to reveal personal data selectively. All the personal data are stored locally and never shared anywhere. Instead, Continuum generates the proof in a way others can not identify you. It is using zkSNARKs(groth16) for proof generation.

Tomoaki Imai

April 25, 2022

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  1. tomo#9487
    Continuum: Privacy to your
    background check
    ZKUniversity final project

    View Slide

  2. Problems
    Difficulty in proving your background pseudonymously
    • Traditional background checks can’t be done without revealing real-identity

    • Companies require background checks to review that the person exists but not
    all data is needed

    • Employees do not have a control of who’s holding personal data

    View Slide

  3. Solution
    Minimize exposing personal data using Zero-knowledge proof
    • Users can select what data needs to be revealed from their personal data

    • Company confirms the validity of the data through Zero-knowledge proof
    background check
    Pseudonym wallet

    of background
    Zero knowledge
    Select data to be

    Proves such that the pseudonym account
    is authorized by the third party and
    revealing data required for bg checks

    View Slide

  4. PoC Design
    • Github is used for authorization and checks. Users can selectively reveal their
    github profile data to generate proofs

    • Once revealed, users can mint NFT to make it visible on-chain

    View Slide

  5. MerkleTrees
    (1)Authorize and get data

    from Github

    - Data is stored locally and it will not
    be sent to anywhere
    (2) When revealed, the commitment hash of
    criteria is stored in Merkle tree
    Commitment hash:

    - Signature of user

    - data to reveal
    MerkleTree exist for every criteria

    - how long you are on Github

    - Received Stars

    - Followers
    (3) Generate Zero-knowledge proof

    from MerkleProof

    (4) verify proof and mint NFT

    View Slide

  6. https://continuum-swart.vercel.app/
    Available on Harmony Test net

    View Slide