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Key agreement method and device in wireless network

A key negotiation and wireless network technology, applied in the field of key negotiation, which can solve the problems of inaccessibility and wireless client authentication failure.

Active Publication Date: 2017-10-27
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Eventually, the wireless client fails to authenticate and cannot access the AP.

Method used

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  • Key agreement method and device in wireless network
  • Key agreement method and device in wireless network
  • Key agreement method and device in wireless network

Examples

Experimental program
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Embodiment Construction

[0022] like figure 1 As shown, the key agreement process of the RSN mode of the prior art includes the following four steps:

[0023] Step S102, the AP sends the EAPOL-Key message Message1 carrying the random number ANonce to the wireless client;

[0024] Step S104, after the wireless client receives Message1, use the random number SNonce generated by the wireless client, the negotiated PMK (Pairwise Master Key, paired master key), and the random number ANonce carried in Message1 to calculate and generate PTK, then use KCK (EAPOL-Key Confirmation Key, LAN-based Extended Authentication Protocol-Key Confirmation Key) in the generated PTK to get MIC (Message Integrity Check, information integrity check), and send a random number to the AP EAPOL-Key message Message2 of SNonce and MIC;

[0025] Step S106, after the AP receives Message2, it uses the random number ANonce, the negotiated PMK, and the random number SNonce carried in Message2 to calculate and generate a PTK, then uses...

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Abstract

The invention discloses a key negotiation method and device for a wireless network. The key negotiation method comprises the steps that A, an AP sends an EAPOL-Key message Message3 to a wireless client side, and timing is conducted; B, if the AP still does not successively receive an EAPOL-Key message Message4 sent by the wireless client after a preset time interval, and a first operation or a second operation is executed; the step A and the step B are repeated until the number of the retransmission times of the Message3 exceeds a preset threshold value of the retransmission times, and it is determined that key negotiation fails, wherein the first operation is key installation or installation of a new key, the second operation is key uninstallation or installation of an old key, when the step B is executed for the (2N-1)th time, the first operation is executed, when the step B is executed for the 2Nth time, the second operation is executed, and N is a natural number larger than 0. According to the key negotiation method and device for the wireless network, the AP finally can right decrypt the Message4 replied by the wireless client and conducts processing on the basis of successive key negotiation, and therefore the wireless client can achieve success identification and have access to the AP.

Description

technical field [0001] The present application relates to the technical field of wireless networks, in particular to a key agreement method and device in a wireless network. Background technique [0002] AP (Access Point, wireless access point) is a wireless transceiver device, which is an access point of a wireless network, one end of which is connected to a wireless client through a wireless network, and the other end is connected to a wired network (such as the Internet). The AP can convert the received wireless signal from the wireless client into data and forward it to the wired network, and convert the received data from the wired network into a wireless signal and forward it to the wireless client. For the security of the wireless network, the wireless client needs to use a key to encrypt the message when communicating with the AP. In this way, when the wireless client goes online, it will negotiate the key with the AP, and both parties negotiate the same key. Encryp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W12/04H04L29/06
CPCH04L9/0838H04L9/0841H04W12/04
Inventor 傅嘉嘉吴蔷刘琛
Owner NEW H3C TECH CO LTD
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