CipherPal: A Privacy-Preserving Smart Fidget Device for Mindful Data Collection and Storage

This demonstration paper presents CipherPal, a next-generation prototype that integrates advanced mood-related sensing, on-device encryption, and decentralized storage to deliver a secure and er- gonomic interface for personal digital interactions. Our research builds upon previous explorations to create an interactive smart fidget device that makes the experience of secure biometric and in- teraction data collection natural and engaging. This paper discusses how we can utilize blockchain technology alongside interaction design to foster a more mindful and sustainable approach to per- sonal data management. The device features dual heartbeat sensors integrated into natural interaction points, and LED feedback for different device states. Users can securely store their interactions using IPFS storage and blockchain technology through its com- panion application, maintaining complete control over their data. CipherPal investigates the delicate balance that must be kept for sustainability between data sharing and digital privacy.