Abstract: A method for providing transparent Ethernet frame adjacency may include removing a MAC addresses from a received Ethernet frame to generate a partial Ethernet frame. The partial Ethernet frame may then be encrypted. The encrypted Ethernet frame may be encapsulated in an Internet Protocol (IP) packet. The IP packet may include an indication of a Security Association (SA). The packet may be sent over a non-secure network. A device may de-encapsulate the payload of a received IP packet to generate the encrypted partial Ethernet frame. The device may decrypt the encrypted partial Ethernet frame to generate a partial Ethernet frame. The decryption device may new MAC addresses based on the SA indicated in the received IP packet. The device may append the new MAC addresses to the partial Ethernet frame such the transmitted Ethernet frame is identical to the Ethernet Frame originated at the source network device.