To provide a signature verification technique with improved usability which can authenticate that there is a high possibility that an illegal wave is received even though a signature can not be verified.
The receiver (100) includes a receiving part (110) for receiving a transport stream with a signature and a verification packet for verifying the signature, a generating part (120) for generating a hash value from a transport stream packet, a collation part (142) for collating a hash value included in the next verification packet of the verification packet with the hash value generated by the generating part, and a verifying part (144) for verifying a section from the verification packet to the next verification packet, wherein the verifying part (144) determines the section to be unverifiable when the next verification packet can not be received even though a prescribed time elapses after the reception of the verification packet.
COPYRIGHT: (C)2009,JPO&INPIT
Shinsaku Kiyomoto
Atsushi Kurihara
Toshiaki Tanaka
Koji Yoshida
KDDI CORPORATION
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Yun Zhou and Yuguang Fang,“Multimedia Broadcast Authentication Based on Batch Signature”,IEEE Communications Magazine,[online],2007年 8月,Volume 45, Issue 8,p.72-77,[retrieved on 2012-04-04]. Retrieved from the Internet,URL,
田中俊昭,中尾康二,清本晋作,“ストリーミング転送における効率的なメッセージ認証方式の検討”,電子情報通信学会技術研究報告(ISEC2001-19~52),日本,社団法人電子情報通信学会,2001年 7月18日,Vol.101,No.214,p.15-22
Kosaku Sugimura
Kiyoshi Kuruma
Shiro Fujitani
Tatsuya Sawada