Privacy Concerns
Presence is highly sensitive information and in non-trivial systems a presentity may define limits to which its presence information may be revealed to different watchers. For example, a worker may only want colleagues to see detailed presence information during office hours. Basic versions of this idea are already common in instant messaging clients as a "Blocking" facility, where users can appear as unavailable to selected watchers.
Read more about this topic: Presence Information
Famous quotes containing the words privacy and/or concerns:
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