https://www.ledgerinsights.com/blockchain-pharma-supply-chain-temperature/ https://www.ledgerinsights.com/blockchain-pharma-supply-chai... It's been done. But

https://www.ledgerinsights.com/blockchain-pharma-supply-chain-temperature/ https://www.ledgerinsights.com/blockchain-pharma-supply-chai... It's been done. But has it really solved a problem? I'm not sure. Perhaps it's just better to use a simpler solution. A key on an iot device could sign every entry.