We are pleased to announce that Jonathan Heiß, Anselm Busse, and Stefan Tai have been awarded the Best Paper Award at this year's International Conference on Service-Oriented Computing 2021 (ICSOC'21). The core of the paper, Trustworthy Pre-Processing of Sensor Data in Data On-chaining Workflows for Blockchain-based IoT Applications, is the design and technical implementation of a solution for preprocessing sensor data as part of data provisioning in smart contract-based IoT applications. In such applications, sensor data is typically preprocessed before being provided to a smart contract due to its large volume and to ensure confidential information remains private. However, naive preprocessing presents an attack surface for data manipulation by a malicious data provider. To address this problem, the authors propose a model for trustworthy preprocessing that enables end-to-end sensor data integrity in data-on-chain workflows to be verified by the smart contract, making it traceable to all involved stakeholders. The feasibility of the model is demonstrated using two different technological approaches: using ZoKrates-based zero-knowledge proofs (ZKPs) and hardware-assisted trusted execution environments (TEEs). Corresponding proof-of-concept implementations and initial experiments in a test environment will also provide first insights into the security and performance aspects of the two technologies.
