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> As long as humans submit the external data to the blockchain someone can cheat with the data. I am glad to see someone else who realizes this point. When peo
by bikingbismuth 5y ago
> As long as humans submit the external data to the blockchain someone can cheat with the data.
I am glad to see someone else who realizes this point. When people were all excited about supply chain blockchains (for example, a blockchain to verify a piece of fruit is picked in a certain place at a certain time, that the transportation truck maintains a certain temperature) I kept asking what stops someone from lying and putting in bad data or tampering with any sensors along the way? There seemed to be this idea that what was on a blockchain was automatically truth just because it was on a blockchain.
- p_l 5y agoI think the only good case is with KSI, but that's not actually a blockchain even if they use the name in marketing. In their case, they limit themselves to verifiable timestamped witness. Someone can still submit bad data, but now you have a log that at time T entity E submitted document D, and if it turns out to be fraudulent you can't backdate or put a different one for it (could be also used to detect tampering with sensors if you receive something that shouldn't pass a sensor that worked correctly yet you obviously have it)