Method and device for key negotiation of wireless network

Abstract

The invention discloses a method for key negotiation of a wireless network. Under a condition that a PMKSA (Pairwise Master Key Security Association) exists between an AP and a wireless terminal, if the wireless terminal correlates or re-correlates with the AP, then a process of four handshake interactions is omitted directly and the correlation process is used to negotiate issue of a PTK (Pairwise Transient Key) and a GTK (Group Temporal Key) so that a link establishment time is shortened and faster data message transmission is realized; and at the same time, a process of four key negotiations between the AP and the wireless terminal is omitted directly so that a possibility that the four handshakes fail is reduced and thus under a condition that a wireless environment is poor, failed processing on a bottom-layer link by an upper-layer application can be reduced or prevented so that interrupt of the upper-layer application is reduced.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a method and device for wireless network key negotiation. Background technique [0002] WLAN (Wireless Local Area Network, Wireless Local Area Network) is a computer local area network with wireless channels as the transmission medium, and is an important supplement and extension of wired networking. The WLAN network is transmitted based on the air interface medium. In order to ensure the security of the network, users generally need to verify and encrypt the message transmission process. In the 802.11 standard, IEEE provides the RSNA (Robust Security Network Association, Robust Security Network Alliance) security architecture. Under the RSNA security architecture, a PMKSA security association (Pairwise Master Key Security Association, Symmetric Master Key Security Association). On this basis, four key handshakes are required between the wireless terminal and the AP to comple...

AI Technical Summary

Problems solved by technology

[0004] The four-way key handshake interaction process takes a long time, even reaching the second level for mobile terminals, which will cause too long voice interruption time;

[0005] The four-way key handshake interaction will cause the wireless terminal to switch channels back and forth, often causing the four-way key handshake interaction process to fail to complete smoothly, resulting in link interruption, which brings difficulties to roaming. This is mainly because the working channel of the new AP It is generally different from the AP that the wireless terminal is currently connected to. The wireless terminal needs to switch to the channel of the new AP to associate. However, after the association, before the completion of the four handshake interactions, the wireless terminal will often switch to the current AP if there is data to be transmitted. on the channel of the new AP, resulting in the inability to receive the interaction message of the new AP, thus causing the interaction failure

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