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Security is a key concern in the Internet of Things Based Smart Environment research. The data generated by smart IoT devices must be dealt with securely. Nowadays with the growing number of smart IoT devices, current systems and security standards cannot guarantee that they will operate successfully in all scenarios. This paper gives a detailed overview of Issues and a way forward to the future related to the IoT Based Smart Environment because of the fast surge of IoT devices users, as well as the variety and complexity of these items and their networks, authentication has become a difficult problem. Other restrictions, such as limited processing capabilities, and restricted storage as well as power in some cases on some of the small embedded devices, make it difficult to execute complicated cryptographic algorithms.