A hardware module for an embedded system comprises a network adapter, a memory and a processing device. The memory stores a shared key and a key identifier (ID) associated with the shared key. The processing device is to connect to a local area network (LAN) using the network adapter. The processing device is further to receive a first notification from a computing device that is also connected to the LAN and determine whether the computing device has access to a copy of the shared key based on the key identifier (ID). Responsive to determining that the computing device has access to the copy of the shared key, the processing device is to use the shared key to generate a session key for a session with the computing device. The processing device may then encrypt communications to the computing device using the session key.