Study of Feasibility for Short Block Length Physical Layer Security Coding in Practical Scenario
Md Munibun Billah
Abstract:
This work explores the feasibility of wiretap codes in physical layer security for a practical environment. We designed a set of experiments using software-defined radios to study the small block length wiretap codes and analyzed the properties of the employed code over distance in an indoor setting. For the experiment, we used one radio to transmit coded and uncoded data over the channel and one radio as the eavesdropper (Eve) who has complete knowledge about the encoder and decoder. To encode the data, small block length reed-muller
code designed for wiretap coding has been used. We calculated
the bit error rate (BER) for both coded and uncoded transmission by varying the distance between the transmitter and eavesdropper to demonstrate potential regions where the legitimate receiver (Bob) will have a secrecy advantage over Eve. The next step of this work will focus on calculating equivocation to determine the amount of uncertainty Eve will have about the message bits.