Tobias Berneth gave a Pecha Kucha talk about how to design intelligent products that collect sensitive personal data.

How smart can our smart products become? Smart products store, and deliver information, but they are only as smart as the information they can gather – or ignore. The intelligent product should be able to recognize redundancies in your personal data as well as constantly adapt to your changing needs.
The most challenging task in designing intelligent products is trust. It is like making new friends: Design products that communicate in a human way! Listen and learn! And above all and never use pressure or try to cheat people.