A method for securing a multi-band wireless communication system includes authenticating a first station (STA) multi-link device (MLD) with a second STA MLD comprising negotiating a group of keys in a key negotiation (KN) band, the group of keys comprising a Pair-Wise Transient Key and a Group Transient Key. The KN band is one of a plurality of frequency bands. The first STA MLD includes a plurality of first STA links. The second STA MLD includes a plurality of second STA links. Each of first STA links and each corresponding second STA link are configured to transceive over a respective one of the plurality of frequency bands. Authenticating the first STA MLD in the KN band authenticates the first STA MLD for each of the frequency bands.