Visual Cryptography for Light Encryption Scheme Using LED Based On Halftoning Algorithm

Abstract

Abstract-Visible Light is regarded as a reliable mode of communication in comparison with Radio Frequency communication. It has a great scope in 5G networks. But this visible light communication is prone to security issues like eavesdropping due to its visual nature. This paper deals with the light encryption scheme using Light Emitting Diode. Keywords: Security, Visual Cryptography, Otsu, Halftone, Lifi I.INTRODUCTION As the technology rules the world currently, security plays a very vital role in data transfer. This can be provided by means of Network security. Cryptography is a study of mathematical technique that relates the aspects of security issues like Data confidentiality, Data Integrity and Data Availability which is referred to as CIA triangle. Visual Cryptography is a new technique of providing information security using simple user algorithms. Complex, computationally intensive algorithm is not used in this technique as used in the traditional cryptographic techniques. As images are more attractive than text, they are more prone to hacking nowadays. The security should be provided for Visible Light Communication of image transmission. As far as now the security for image transmission in VLC was provided by an Otsu algorithm which has enhanced Bit Error Rate but has a limitation on computational time and image sharing scheme. This can be overcome by an Image security algorithm called halftone algorithm. The proposed idea will overcome the limitations that were mentioned above. Figure1 represents the light encryption system using laptops. The VLC signal from a LED can be received by a light encrypting device like mobile or laptops, which could be any device that has a optical receiver such as photodiode or an camera image sensor, and also having a visible LED for optical transmitter. After the visible light signal from LED is received by the light encrypted device, the image data can be encrypted by applying halftone algorithm followed by an XOR cipher. This ensures double encrypted security for the data to be sent. The above implementation could be made possible for the future VLC medium.