US 9,813,397 B2
Communication system, communication apparatus, communication method, and computer program
Takehiko Nakano, Tokyo (JP)
Assigned to SONY CORPORATION, Tokyo (JP)
Filed by SONY CORPORATION, Tokyo (JP)
Filed on Sep. 15, 2016, as Appl. No. 15/266,730.
Application 15/266,730 is a division of application No. 14/587,678, filed on Dec. 31, 2014, granted, now 9,553,857.
Application 14/587,678 is a continuation of application No. 13/810,792, granted, now 8,949,605, previously published as PCT/JP2011/062739, filed on Jun. 2, 2011.
Claims priority of application No. 2010-171184 (JP), filed on Jul. 29, 2010.
Prior Publication US 2017/0006005 A1, Jan. 5, 2017
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 29/06 (2006.01); G06F 21/10 (2013.01); G06F 21/44 (2013.01); H04L 9/32 (2006.01); H04L 9/08 (2006.01)
CPC H04L 63/068 (2013.01) [G06F 21/10 (2013.01); G06F 21/445 (2013.01); H04L 9/088 (2013.01); H04L 9/0819 (2013.01); H04L 9/0844 (2013.01); H04L 9/3271 (2013.01); H04L 9/3273 (2013.01); H04L 63/061 (2013.01); H04L 63/0869 (2013.01); G06F 2221/2103 (2013.01); G06F 2221/2107 (2013.01); G06F 2221/2129 (2013.01); H04L 2209/60 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A sink apparatus for communicating with a source apparatus, the sink apparatus comprising:
one or more physical processors configured to:
transmit to the source apparatus a first piece of identification information associated with the sink apparatus;
transmit to the source apparatus a key and a challenge signal in a challenge and response procedure, the key being stored in the source apparatus according to a result of comparison between the first piece of identification information and a second piece of identification information stored in the source apparatus;
transmit to the source apparatus a command to maintain the key stored in the source apparatus; and
transmit to the source apparatus a key-life updating request to update a time value counted by a timer maintained by the source apparatus for the key associated with the sink apparatus.