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.

Transcript

1. tomo#9487
   https://twitter.com/tomoima525
   Continuum: Privacy to your
   background check
   ZKUniversity final project
   

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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
   

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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
   third-party
   background check
   service
   Blockchain
   Pseudonym wallet
   commitment
   
   of background
   Zero knowledge
   Proof
   Select data to be
   
   revealed
   Proves such that the pseudonym account
   is authorized by the third party and
   revealing data required for bg checks
   

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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
   

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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
   

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

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