Abstract

Today, as mobile devices become more and more functional, our mobile phones are becoming more and more secure. More security modules and measures have been added to mobile phones, not only security measures at the application layer and kernel layer, but also underlying security chips. The security world plays an increasingly important role in this. It not only plays the role of a bridge, but also the core of many security needs.

In our past research on analyzing Android's underlying security, we delved into the security world of mobile devices of Samsung, the leading android manufacturer, including exynos, qualcomm, and mediaTek series of mobile phones. They have many similarities in their respective implementations, but also some differences. We have found more than 20 security vulnerabilities in different modules and levels, including more than 10 high-risk vulnerabilities.

In the topic, we will focus on analyzing and comparing the differences in the implementation of the security world on different chipset, and analyze the security vulnerabilities we have discovered. In addition, we will introduce some special security modules (blockchain, etc.) and analyze the security vulnerabilities found in them.