Sensor technologies have evolved to a point where it is now practical to monitor products along the supply chain. The collected data can be stored in a decentralized way using blockchain technology. However, ensuring the reliability of the sensed data is a critical challenge. In other words, we need to trust the data that we write to the blockchain. In this work, we propose ChainGuards, a decentralized system that uses product-specific rules to verify data collected across the supply chain, with particular focus on sensor-derived information, issuing warnings and triggering audits when anomalies are detected. We evaluated ChainGuards using data from a real cherry supply chain deployment. The result shows that the implemented solution provides reliable verification of supply chain data with low performance overhead, able to correctly detect data discrepancies and inconsistencies.

翻译：传感器技术已发展到可沿供应链实时监控产品的阶段，所采集的数据可利用区块链技术实现去中心化存储。然而，确保传感数据的可靠性仍是一项关键挑战——换言之，我们需要信任写入区块链的数据。本文提出ChainGuards，一个利用产品特定规则验证供应链全流程数据（尤其聚焦于传感器衍生信息）的去中心化系统，当检测到异常时能发出预警并触发审计。我们采用真实樱桃供应链部署数据对ChainGuards进行评估，结果表明，该实现方案能以较低性能开销提供可靠的供应链数据验证，准确检测数据差异与不一致性。