packet capture tool three way hand shake

When management frame protection is negotiated, the negotiated pairwise cipher suite is used to protect individually addressed robust Management frames, and the group management cipher suite is used to protect group addressed robust Management frames.Ĭipher Suite Selectors defined in IEEE802.11-2016 standard (table 9.131) shown below. Group Management Cipher Suite – cipher suite selector used by BSS to protect group addressed robust management frames.

Pairwise Cipher Suit List– contain series of cipher suite selectors that indicate pairwise cipher suites.ģ. Group Data Cipher Suite – contain cipher suite selector used by BSS to protect group addressed frames.Ģ. In RSNE, there are three type of cipher suitesġ. Also note that both MFP Required & MFP Capable set to true (In other words management frame protection is mandatory with SAE). If you look at details of a Beacon frame, you will notice AKM Suite is 00-0F-AC:8 (SAE) under RSNE. If you look at the frame exchange,you will see it includes 4 Authentication frames, Association Request, Association Response followed by 4-Way Handshake (M1-M4 messages). Here is a packet capture when client is connecting to above SSID (follow this post to see packets as 802.11 frames). Here is the WLAN security configuration on my SSID. Pls note that following restriction applies when you configure WPA3-SAE in AireOS 8.10.x version. In this post we use AireOS based WLAN configuration to study WPA3-SAE operation. Protected Management Frames (PMF) is mandatory in WPA3-SAE mode.Ĭisco introduced WPA3 support to its AireOS based controllers from version 8.10.x onward (It is 16.12 onward for IOS-XE based controllers). WiFi Alliance also introduced WPA3-SAE Transition Mode which we will look at in a later post.

With WPA3-Personal, PMK is not depend on the password. In WPA2-Personal, PMK is derived from the password hence a major weakness of that mechanism (it is very easy to decrypt WPA2-PSK traffic). It is based on SAE – Simultaneous Authentication of Equals, an password based authentication and key establishment protocol initially introduced in IEEE 802.11s for mesh networks. In this post, we will look at WiFi Alliance WPA3-SAE (also known as WPA3-Personal) to replace WPA2-Personal which is susceptible to offline dictionary attack.

Packet capture tool three way hand shake