Packet processing method and apparatus, system

Example embodiments disclosed species packet processing method and apparatus according to the present invention, the system, the first node receives the relay packet transmitted from the first apparatus, the first packet data node comprises sending a second message to the relay device, a second data packet in the additional authentication data using a second session key between the first node and the second node encrypted authentication data by a second additional node using a second rule at least in accordance with a second message packet the address information in the message header generated; the first node generates the address of the additional data using the first authentication rule information of the packet in the packet header; session key using the first additional authentication data, the first node and a second node the first packet of data is decrypted. Solve the conventional reduction relaying device between the station and the access point forwards the re-encrypted to be decrypted packet time resulting from the process channel utilization problems.