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1. (WO2017037972) AUTHENTICATION METHOD, NOTIFICATION METHOD, SOURCE DEVICE AND SINK DEVICE

Pub. No.:    WO/2017/037972    International Application No.:    PCT/JP2016/002948
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Jun 21 01:59:59 CEST 2016
IPC: H04N 21/4367
G06F 21/44
H04L 9/32
Applicants: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカ
Inventors: NISHIO, Toshiroh
西尾 歳朗
YAMAMOTO, Masaya
山本 雅哉
KOZUKA, Masayuki
小塚 雅之
MORI, Yoshihiro
森 美裕
TOMA, Tadamasa
遠間 正真
Title: AUTHENTICATION METHOD, NOTIFICATION METHOD, SOURCE DEVICE AND SINK DEVICE
Abstract:
An authentication method in a source device 100 connected to communicate with a sink device 200 through HDMI (registered trademark) comprises: acquiring random numbers (S131); transmitting the random numbers to the sink device 200 using communication via HDMI CEC Bus 310 (S132); receiving, from the sink device 200, first signature information obtained by encrypting the random numbers using a first secret key 10 for the sink device 200, and capability information 22 relating to the display capability of the sink device 200 using the communication (S133); acquiring the result of a first determination whether or not first decrypted information obtained by decrypting the first signature information using a first public key 21 having a pair relationship with the first secret key 10 matches the transmitted random numbers (S134); and when the first decrypted information matches the transmitted random numbers as a result of the first determination, determining that the received capability information is correct information, and outputting an image corresponding to the capability information to the sink device 200 (S136).