23A wireless communications device has a first security key, a second security
key, and established channels. Each established channel has a corresponding security
count value, and utilizes a security key. At least one of the established channels
utilizes the first security key. The second security key is assigned to a new channel.
A first set is then used to obtain a first value. The first set has only security
count values of all the established channels that utilize the second key. The first
value is at least as great as the x most significant bits (MSBx) of
the greatest value in the first set. The MSBx of the initial security
count value for the new channel is set equal to the first value. If the first set
is empty, then the initial security count is set to zero.
