Method and device for sharing security key on basis of multi-access point operation in wireless lan system

A first station (STA) comprising:

• at least one transceiver;
• and
• at least one processor connected to the at least one transceiver,
• wherein the at least one processor is configured to:
• generate a multi-access point group temporal key (MAGTK);
• and
• transmit, through the at least one transceiver, a MAGTK encrypted based on a key shared between the first STA and at least one second STA to the at least one second STA,
• wherein a security key for a third STA is encrypted based on the MAGTK and shared with the first STA and the at least one second STA.

A second station (STA) comprising:

• at least one transceiver;
• and
• at least one processor connected to the at least one transceiver,
• wherein the at least one processor is configured to:
• obtain a key shared between a first STA, and at least one second STA including the second STA;
• and
• receive, through the at least one transceiver, from the first STA, a multi-access point group temporal key (MAGTK) encrypted based on the key shared between the first STA and the at least one second STA,
• wherein the MAGTK is generated by the first STA, and
• wherein a security key for a third STA is encrypted based on the MAGTK and shared with the first STA and the at least one second STA.