A system for securing an electronic communication comprises a gateway server configured to receive and store a device identifier and a network address from a first computing device. The device identifier identifies the first computing device, and the network address is associated with the first computing device. Thereafter, the gateway server receives from a second computing device the network address of the first computing device and an encryption key request. The gateway server derives from the device identifier for the first computing device an encryption key and sends the encryption key to the second computing device. A communication from the second computing device to the first computing device may thereafter be secured using the encryption key. A related method of securing an electronic communication is also disclosed.