TPMWallet: Towards Blockchain Hardware Wallet using Trusted Platform Module in IoT

Ensuring the authenticity of the system communication and the well-preservation of the provided data is the basic and important foundation of a well-operated information system. Although Blockchain, being a secure and decentralized database, contributes to various proposals for enhancing IoT security, the very technology does not ensure that each transaction on chain is coming from the account with owner's proper authorization. A stolen wallet not only can make the owner affected financially, but also can bring questionable actions under the owner's title, such as providing problematic materials to terminate effective smart contracts. When it comes to a private chain in some enterprises, stolen wallets can make network administrators hard to identify the authenticity of transactions. When no one can tell whether the transaction is coming from the genuine device or someone is withholding the stolen wallet, sabotages can be performed. For this issue, we introduce TPMWallet, a blockchain-based hardware wallet via Trusted Platform Module (TPM), which can provide a secure subsystem dedicated for security. It can not only cover the functionality of the existing hardware wallet, but also provide more than we can obtain today - the policy. This allows TPM only operating under matching conditions, increasing the difficulty for attackers to tamper.