Content processing apparatus and content protection program
First Claim
1. A contents processing device for outputting enciphered contents to a recording medium comprising:
- a contents storage unit for storing contents;
a first ID storage unit for storing a first ID being intrinsic to said contents processing device and being capable of uniquely identifying said contents processing device;
a second ID storage unit for storing a second ID being intrinsic to said contents processing device and being capable of uniquely identifying said contents processing device and being different from the first ID;
a ciphering unit which, when said first ID is stored in said first ID storage unit, obtains said first ID from said first ID storage unit, enciphers contents within said contents storage unit by use of a title key separately generated, and enciphers said title key by use of a first ciphering key generated from said first ID, and when said first ID is not stored in said first ID storage unit, obtains said second ID from said second ID storage unit, enciphers contents within said contents storage unit by use of a title key separately generated, and enciphers said title key by use of a second ciphering key generated from said second ID;
an output unit for outputting the enciphered contents and enciphered title keys toward said recording medium.
3 Assignments
0 Petitions
Accused Products
Abstract
A contents processing device permitting, when contents are to be stored in a recording medium, only a specified device to read out the stored contents is to be provided, and a contents processing device capable, where it is a mobile telephone, of flexibly adapting to a change of a unique telephone number or a type of the mobile telephone. For the purpose, the contents processing device for inputting and outputting contents to and from a recording medium is provided with contents storage means (RAM) for storing contents, an ID storage unit (ROM) for storing an ID capable of identifying the contents processing device, a recording medium input/output unit (memory card I/F) for inputting to and outputting from the recording medium, and a ciphering unit (ciphering program) for enciphering contents within the contents storage unit by use of a ciphering key generated from the ID within the ID storage unit and storing it from the recording medium input/output unit into the recording medium.
17 Citations
11 Claims
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1. A contents processing device for outputting enciphered contents to a recording medium comprising:
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a contents storage unit for storing contents; a first ID storage unit for storing a first ID being intrinsic to said contents processing device and being capable of uniquely identifying said contents processing device; a second ID storage unit for storing a second ID being intrinsic to said contents processing device and being capable of uniquely identifying said contents processing device and being different from the first ID; a ciphering unit which, when said first ID is stored in said first ID storage unit, obtains said first ID from said first ID storage unit, enciphers contents within said contents storage unit by use of a title key separately generated, and enciphers said title key by use of a first ciphering key generated from said first ID, and when said first ID is not stored in said first ID storage unit, obtains said second ID from said second ID storage unit, enciphers contents within said contents storage unit by use of a title key separately generated, and enciphers said title key by use of a second ciphering key generated from said second ID; an output unit for outputting the enciphered contents and enciphered title keys toward said recording medium. - View Dependent Claims (2, 3, 4, 5)
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6. A contents processing device for inputting contents from a recording medium comprising:
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an input unit for obtaining ciphered contents and ciphered title key from said recording medium; a first ID storage unit for storing a first ID being capable of uniquely identifying said contents processing device; a second ID storage unit for storing a second ID being capable of uniquely identifying said contents processing device and being different from the first ID; a deciphering unit which, when said first ID is stored in said first ID storage unit, deciphers the title key ciphered by use of a first ciphering key generated from said first ID, and further deciphers the ciphered contents by use of the deciphered title key; and
when said first ID is not stored in said first ID storage unit, deciphers the title key ciphered by use of a second ciphering key generated from said second ID stored in the second ID storage unit; anda contents storage unit for storing the deciphered contents. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification