Abstract
As the wireless communication greatly depends on spectrum utilization, the increase in demand for new wireless services and their application leads to the spectrum scarcity. In order to utilize the available spectrum efficiently, radio- The demanding technology is introduced. It is a dynamic technology that can sense the medium, utilizes the available white spaces, for transmission by detecting its neighboring devices. The cognitive radio targets to increase the efficiency of the spectrum changes without causing any intervention to the licensed users. Since cognitive radio works in the open network space, it increases the chance of the attacker to show intervene on the spectral medium. So, the security becomes the key factor. This leads to the realization of various security threats in the cognitive radio. There are various papers covering the security issues over the threats in cognitive radio, but this paper provides an advanced survey over attacks and common threats and the possibility of securing the available spectrum from the attackers. In addition to that future scope and challenges are also addressed. This survey will help the researchers to identify the space left out and the problems to be attached related to security issues on cognitive radio.
Highlights
For the past decade wireless technology shows a drastic improvement in its technological and its application aspects. This increases the number of available wireless users. These wireless users greatly rely on the available radio spectrum, which leads to a scarcity in the available spectrum
The Federal Communications Commission (FCC) insists that certain portions of the RF spectrum are made available for public use, which is vacant[1]
This paper focuses on the analysis of security issues in various perspectives on the cognitive radio networks
Summary
For the past decade wireless technology shows a drastic improvement in its technological and its application aspects. Cognitive radio is defined as a software defined radio[3,4] in wireless communication, that sense the environment and detect the free space amongst the crowded channel, and utilize the vacant space efficiently It can work on the available channel as a secondary user paving way for both the user without any interference[6]. When comparing the physical layer to the other corresponding layers the security over the higher layers is done through various higher layer authentication and encryption methods They focus on securing cognitive radio from the lowest layer i.e., physical layer, since the CR relies heavily on PHY layer spectrum sensing leaving the system vulnerable to physical layer attacks[10,11].
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