Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2007-10-02
2007-10-02
Smithers, Matthew B (Department: 2137)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
Reexamination Certificate
active
10621308
ABSTRACT:
A digital watermarking apparatus inputs video or audio information and embeds digital watermark in the information, which is capable of preventing digital watermark or set values necessary for digital watermarking operation from being altered. The apparatus includes a verifying section, a decrypting section and a watermarking section. The verifying section verifies encrypted set values using verification data in set values which is added with verification data and encrypted together with verification data, and transmits the verification result to the watermarking section. The verifying section also transmits the encrypted set values which are verified to the decrypting section. The decrypting section decrypts the encrypted set values. The watermarking section embeds digital watermark in the information using the decrypted and verified set values to output it, when a verification result from the verifying section is normal. When the verification result is not normal, the watermarking section does not output the input information to the outside of the apparatus.
REFERENCES:
patent: 6453053 (2002-09-01), Wakasu
patent: 6785815 (2004-08-01), Serret-Avila et al.
patent: 2002/0108043 (2002-08-01), Tanaka
patent: 2004/0128511 (2004-07-01), Sun et al.
patent: 2005/0066172 (2005-03-01), Vorbruggen et al.
patent: 2005/0182939 (2005-08-01), Yoshiura et al.
patent: 0 851 679 (1998-07-01), None
patent: 2 330 031 (1999-04-01), None
patent: 3106985 (2000-09-01), None
patent: 2001-78013 (2001-03-01), None
patent: 2002-132914 (2001-03-01), None
patent: 2002-232412 (2002-08-01), None
Okada Takanori
Yoshida Shuichi
Matsushita Electric - Industrial Co., Ltd.
Smithers Matthew B
Wenderoth , Lind & Ponack, L.L.P.
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