I. Introduction
The emerging area of Internet of Things (IoT) demands for more security and the security is defined a s a fundamental block which requires to be addressed. Security attacks on IoT are easier because of the vulnerable nature of devices (any-thing) which is primarily due to ease of physical accessibility to these things. The wireless communication techniques used for the realization is vulnerable too. The possibility of frequent dropping of data communicated can also help the intruders to gain control over the data. In case of IoT heavy computation for security is not possible as it cannot be traded off with other features like low power consumption and smaller size. This paper tries to find a path to improve the security through introducing a novel theme in encryption of data and salient features of opportunistic large array (OLA) architecture.