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RFID Two-Factor Authentication Service
An RFID two-factor authentication service that encrypts and stores an RFID (with a user) in a public blockchain. A client makes a request to the service on behalf of a given user that has provided their RFID, and the service will confirm if that RFID is correct.
NOTE: To ensure that people can’t just take the value of the contract from the contract and submit that value to the service directly, the RFID encrypted by the server is encrypted using a secret only the server knows. Further improvements involve methods of not needing a centralized private key known only to the server.