What is Eavesdropping and how can it be prevented? Eavesdropping is the intentional act of secretly or stealthily listening to the private conversation or communications of others without their consent. Telecom Metric uses the SRTP protocol to provide media encryption and message authentication for both the phone’s network as well as trunking. This protects clients from replay (man-in-the-middle) and eavesdropping attacks. Learn More: Secure Voice Communications