One of the biggest difficulties in the realm of technology is underwater wireless communication. Due to the increase in the number of vehicles and other equipment being used underwater, which need high bandwidth and consequently large capacity for information transfer, underwater wireless information transfer is of great importance. It was put forth and has gotten the most attention in the past 10 years. Although this field has made successive advancements, there has also been a concurrent constraint, which led to the replacement of acoustics with infrared waves (IR). The light emitting diode that delivers pulsed bursts of IR radiation to the light sending diode inside the second communication module receives the pulsed signal after it has passed through the modulation circuit. A suitable strategy is then chosen for the communication with the least amount of loss and the greatest amount of distance. In this paper, a secure underwater communication method is proposed.