Data processing: financial – business practice – management – or co – Business processing using cryptography – Usage protection of distributed data files
Reexamination Certificate
2007-03-13
2007-03-13
Dixon, Thomas A. (Department: 3628)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Usage protection of distributed data files
Reexamination Certificate
active
09964378
ABSTRACT:
A content recording method using a communication means, including reading from a recording medium identification information unique to that recording medium, receiving through the communication means permission information for permitting recording of content on that recording medium, receiving content information through the communication means, and after confirming validity of the permission information, encrypting the received content information using both the unique identification information and a cipher key, and recording the encrypted content information on the recording medium.
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Gotoh Yoshiho
Koishi Kenji
Moriya Mitsurou
Oshima Mitsuaki
Takemura Yoshinari
Dixon Thomas A.
Matsushita Electric - Industrial Co., Ltd.
Steptoe & Johnson LLP
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