  Today is the era of Internet of Things (IoT), millions of machines such as
cars, smoke detectors, watches, glasses, webcams, etc. are being connected to
the Internet. The number of machines that possess the ability of remote access
to monitor and collect data is continuously increasing. This development makes,
on one hand, the human life more comfort- able, convenient, but it also raises
on other hand issues on security and privacy. However, this development also
raises challenges for the digital investigator when IoT devices involve in
criminal scenes. Indeed, current research in the literature focuses on security
and privacy for IoT environments rather than methods or techniques of forensic
acquisition and analysis for IoT devices. Therefore, in this paper, we discuss
firstly different aspects related to IoT forensics and then focus on the cur-
rent challenges. We also describe forensic approaches for a IoT device
smartwatch as a case study. We analyze forensic artifacts retrieved from
smartwatch devices and discuss on evidence found aligned with challenges in IoT
forensics
