4 ms·

How do you know the equipment wrote the correct temperature to the blockchain in the first place?

• ThePhysicist 5y ago
  You don't.
• aitchnyu 5y ago
  Cryptographic signing of the temperature readings will do right? I have a pet idea of electricity meters that cryptographically sign their value and timestamp. We have state employees who come every month and take readings. We can automate these readings without going full IOT.
  • konha 5y ago
    Right. If you have to trust the device anyway, a blockchain only adds unnecessary complexity and signing the data will do.
    • xupybd 5y ago
      No it makes the data tamper proof. That's a different problem to making the source data reliable. Tampering happens when your delivery service tries to cover up a freezer outage. Yes they could grab the sensors and throw them in another freezer but you can't solve every problem with one tool. At least they can't try to do anything to alter the history so it makes it harder. Much like I can enter a locked home, but the lock makes it harder. The alarm makes it harder again. But nothing is fool proof.