Collectivist, most messages are intended for the whole group, with ocassionally talking to a specific person, but it's expected the message will be understood by other people who are present. There is very little "code talking" within the group.
In individualist cultures, it's expected that most messages are targeted to specific people, and there can be whole dialogues meant to be only understood by the two people. Or a message may be superficially said to one person, but is actually meant to be overheard by another person. Very often what is said isn't actually true, but it was only said as a means to an end (to make somebody do or say something) and the people involved are expected to understand that. Very litle detail and deeper information is shared, things are rarely said that are not strictly necessary to know.