Structured Coding for Authentication in the Presence of a Malicious Adversary

Authentication in the presence of a malicious adversary consists of either recovering the legitimate transmission or declaring that the adversary has interfered with the transmission. In this work, we present a structured coding scheme for keyless authentication over a discrete memoryless binary-input, symmetric adversarial channel. Our scheme allows for coding rates up to the non-adversarial capacity of the underlying channel, as well as bounded-complexity decoding.