• G. Rekha
• Y.Suneetha

Internet of Things is a newly-visible technology having the ability to change the way we live. Many IoT services can make our daily life easier, smarter, and even safer. IoT is growing rapidly in the field of telecommunications. Numerous IoT services can make our daily life easier and even smarter. However, all those benefits can come of huge risks of privacy loss and security issues. To secure the IoT devices, many research works have been conducted to encounter those problems and find a better way to eliminate or to reduce those risks. In this paper we presented a survey which consists of three pieces/parts. The first part will explore the limitation of IoT devices which increases the security and privacy issues. The second one will discuss the present classification of IoT attacks. Third part will explain about threats to the Internet of things security. Finally, an integration of IoT devices which improves security using Block Chain.

Block Chain, Internet of Things (IoT), Distributed Denial of Service (DDoS), Security, Privacy.

" THREATS IN IOT AND SECURITY BY INTEGRATED IOT DEVICES USING BLOCK CHAIN :A SURVEY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.238-244, June-2019, Available :http://www.jetir.org/papers/JETIR1906181.pdf

" THREATS IN IOT AND SECURITY BY INTEGRATED IOT DEVICES USING BLOCK CHAIN :A SURVEY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp238-244, June-2019, Available at : http://www.jetir.org/papers/JETIR1906181.pdf