Patent ID: 9002013
Filing Date: 2015-04-07
Classification: H04L,H04N

Abstract:
1. An apparatus for displaying information received from a communication apparatus within a presentation room and which information is to be presented to multiple users in the presentation room, comprising: a key information producing unit including a processor configured to produce key information used to authenticate said communication apparatus; a key information distributing unit including a processor configured to distribute said key information only to the presentation room; an authentication information receiving unit including a processor configured to receive authentication information from the communication apparatus in the presentation room; an authenticating unit including a processor configured to authenticate said communication apparatus by verifying whether or not said authentication information was formed based upon said key information; a display information receiving unit including a processor configured to receive display information from said authenticated communication apparatus; and an output unit to display the display information received from said authenticated communication apparatus to the multiple users in the presentation room; wherein said authenticated communication apparatus has a distribution range during reception of said key information such that said outputted key information can be acquired; wherein said key information distributing unit includes a display unit configured to visually display said key information, and the distribution range of said key information is such that said key information displayed on said display unit can be visually viewed within the presentation room.