公开(公告)号：US20170317835A1

公开(公告)日：2017-11-02

申请号：US15644862

申请日：2017-07-10

申请人： Panasonic Intellectual Property Corporation of America

发明人： TOSHIROH NISHIO ,  MASAYA YAMAMOTO ,  MASAYUKI KOZUKA ,  YOSHIHIRO MORI ,  TADAMASA TOMA

IPC分类号： H04L9/32 ,  H04L9/30 ,  H04L9/14 ,  G06F7/58

CPC分类号： H04L9/3263 ,  G06F3/14 ,  G06F7/588 ,  G06F21/44 ,  G06F2221/2103 ,  G09G5/005 ,  H04L9/14 ,  H04L9/30 ,  H04L9/32 ,  H04L9/321 ,  H04L9/3247 ,  H04L9/3271 ,  H04L63/0838 ,  H04L2209/60 ,  H04N21/43635 ,  H04N21/4367

摘要： A method for use in a source device includes: acquiring a random number; transmitting the random number to a sink device through a High Definition Multimedia Interface-Consumer Electronics Control (HDMI-CEC) bus; receiving first signature information and capability information from the sink device through the HDMI-CEC bus, the first signature information being information in which the random number is encrypted with a first secret key of the sink device, the capability information being information about a display capability of the sink device; acquiring a result of a first determination whether first decrypted information is compatible with the transmitted random number, the first decrypted information being obtained by decrypting the first signature information with a first public key paired with the first secret key; determining that the received capability information is correct information when the result of the first determination is that the first decrypted information is compatible with the transmitted random number; and outputting video corresponding to the capability information to sink device.