\chapter{Introduction}

In our lifes we use many communication technologies that work over a short range: for connecting our mice and keyboards to our computers, listening to music wirelessly and to pay contactlessly. Those technologies include but are not limited to: Bluetooth, RFID, NFC and many others.

What many of those technologies have in common is that they work on top of radio waves that utilize electromagnetic induction. Some problems of radio waves are the difficulty of passing through conductive materials such as water or metals \cite{RadioWaves} and they are susceptible to interference \cite{RadioInterference} and jamming \cite{RadioJamming}.

Other reseach projects in this area exists and some have covered the use of the magnetic fields emitted from CPUs as a communication channel \cite{MagneComm} and other cover the general use of magnetic induction communication in body area networks \cite{magneticInductionBAN}. 

This thesis will research the concept of communication using magnetic induction and will create a prototype implementation of a protocol that works through attempted manipulation of magnetic fields using a CPU in a Laptop. A simple user interface in the form of a website is created that allows an user to send text over the protocol and an Android application is used for receiving the text over the protocol.

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