Abstract: A method for wireless communication using a service side-channel signaling and authentication at the physical level. This method comprising the steps of creating at least one transmitting node and one receiving node within a wireless communication channel. Then choosing primary message and a secondary message and generating a valid transmission tag. Then superimposing the valid transmission tag and creating a set of secret codebooks in order to form a side-channel. Then applying key equivocation metric to measure key information leakage to an eavesdropper. Then transmitting said primary message and said secondary message. Then a receiver receiving said primary and said secondary messages detecting fingerprint estimating data combining a key set with the estimated data sending data and key set to a matrix to generate a secret codebook searching for valid tags authenticating and recovering side information.