Dongsung Kim had a presentation in DEF CON 26 held on August 9-12 in Las Vegas, NV, USA.

Your Watch Can Watch You! Gear Up for the Broken Privilege Pitfalls in the Samsung Gear Smartwatch
Slides | Video

He focused on a communication channel between applications and system services, and how each internal Tizen OS component plays the parts in access control.
Based on the analysis, he had developed a new simple tool to discover privilege violations in Tizen-based products.
He presented an analysis on the Gear smartwatch which turns out to include a number of vulnerabilities in system services.