This paper study the recent IoT Security researches and classifies them into the following tends Cryptography, Authentication, Blockchain, and data privacy preserving.
Internet of things becomes important and its applications have widely used in the last years. These applications need a protection system against different attacks. This paper study the recent IoT Security researches and classifies them into the following tends Cryptography, Authentication, Blockchain, and data privacy preserving. And at last of this paper gives the conclusions and future work.