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Internet of Things (IoT) has gained increasing visibility among emerging technologies and undoubtedly changing our daily life. Its adoption is strengthened by the growth of connected devices (things) as shown in recent statistics. However, as the number of connected things grows, responsibility related to security aspects also needs to increase. For instance, cyberattacks might happen if simple authentication mechanisms are not implemented on IoT applications, or if access control mechanisms are weakly defined. Considering the relevance of the subject, we performed a systematic literature review (SLR) to identify and synthesize security issues in IoT discussed in scientific papers published within a period of 8 years. Our literature review focused on four main security aspects, namely authentication, access control, data protection, and trust. We believe that a study considering these topics has the potential to …