On-chain TOPT (Time-based One-Time-Password).
The user client, which also possesses the secret key, generates a TOTP code that can be validated on-chain without the necessity of decrypting the secret key. Employing FHE, it becomes feasible to perform a multiplication operation between the secret key and the timestamp in an encrypted manner, subsequently comparing the product to the TOTP code for verification.
The Solidity contract can be found in TOTP.sol.
Clone the project, then run:
npm install
npm run devThe dapp should run on http://localhost:5173.