Journal of Cognitive Human-Computer Interaction JCHCI 2771-1463 2771-1471 10.54216/JCHCI https://www.americaspg.com/journals/show/1040 2021 2021 Department of Computer Science & Engineering, AIET, Jaipur, India Pooja Pooja Department of Computer Science & Engineering, AIET, Jaipur, India Dr. Manish Kumar Mukhija Department of Electronics & Communication, AIET, Jaipur, India. Satish Kumar Alaria In modern world of advancement, cloud technology is taking its grip. COVID-19 also enhance the use of the cloud services. The cloud concept comes with the new advancement of technology, but with that data breaches and data hacks are also increasing. In the cloud-based environment, we suggested the model of security enhancement which, make use pf role-based security model where the files are shared according to the role and the access of such file is controlled using TPA validation and apart for that the concept of authentication of user is also suggested using the Pattern Lock based graphical system for pattern formation. The pattern obtained are validated using the various of online password or pattern strength validation tools, results which are obtained proves that pattern obtained through the proposed concept performs better against the attack. 2022 2022 8 14 10.54216/JCHCI.020101 https://www.americaspg.com/articleinfo/25/show/1040