Content copying device and content copying method

Cryptography – Video cryptography – Copy protection or prevention

Reexamination Certificate

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Details

C380S044000, C713S169000

Reexamination Certificate

active

07869595

ABSTRACT:
A content copying device has a mutual authentication section that performs a mutual authentication with a copy source recording medium and a copy destination recording medium respectively and generates a first medium unique key and a second medium unique key, a content key decrypting section that reads an encrypted content key from the copy source recording medium, and decrypts the encrypted content key using information based on the first medium unique key, a content key encrypting section that encrypts the decrypted content key using information based on the second medium unique key and writes the encrypted content key onto the copy destination recording medium, and a content copying section that reads an encrypted content from the copy source recording medium and writes the content onto the copy destination recording medium without performing decryption.

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patent: 7353541 (2008-04-01), Ishibashi et al.
patent: 2001/0032088 (2001-10-01), Utsumi et al.
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patent: 2004-139433 (2004-05-01), None
English language Abstract of JP 11-328033.
English language Abstract of JP 2004-139433.
English language Abstract of JP 2001-333371.
English language Abstract of JP 10-222930.
English language Abstract of JP 2000-259775.
English language Abstract of JP 2000-330871.
English language Abstract of JP 8-008851.
English language Abstract of JP 2003-233795.
English language Abstract of JP 2000-308129.

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