Internet of Things (IoT) has evolved into a well-recognized term for solutions used across many industry segments. Despite the popularity, there are still multiple challenges. IoT is often seen as a network of connected smart devices providing a lot of data. Still, it can also become a nightmare when it comes to perspectives as security, privacy, and quality.
This Special Issue considers these three perspectives that deserve special attention. It aims for novel works, reviews, and comparative studies focusing on one of the core issue aspects. It welcomes novel approaches with promising preliminary results or work with a multi-disciplinary span, including Big Data, blockchain, machine learning, architecture reconstruction, architectural degradation, and cloud-computing, among others.