Information network system and information apparatus
First Claim
1. An information network system, comprising a first information apparatus and a second information apparatus, whereinthe first information apparatus comprises:
- a first internal recording medium for storing contents data;
a first interface which transfers data relating to the contents data recorded in the first internal recording medium to an external recording medium when the external recording medium is attached to the first information apparatus; and
a first transmission/reception unit for connecting the first information apparatus to a network, andthe second information apparatus comprises;
a second internal recording medium for storing contents data;
a second interface; and
a second transmission/reception unit for connecting the second information apparatus to a network, wherein;
the first internal recording medium comprises an area for storing the contents data and a secured area for storing various kinds of data with limited accessibility,the first information apparatus is configured to;
upon receiving a request to move the contents data to the external recording medium while the external recording medium is being attached to the first information apparatus,read out the contents data from the first internal recording medium and transfer the read contents data to the external recording medium after performing compression-conversion to the read contents data;
encrypt the contents data by using an encryption key to be stored in the secured area of the first internal recording medium;
record contents management information that contains key information relating to the encryption key in the external recording medium; and
then delete the key information relating to the encryption key, andthe second information apparatus is configured to;
when the external recording medium that holds the compression-converted contents data is attached to the second information apparatus,obtain the contents management information from the external recording medium and search the network by using the obtained contents management information to find out the first information apparatus that holds the encrypted contents data corresponding to the contents management information;
obtain, through the network, the encrypted contents data from the found first information apparatus; and
decrypt the obtained encrypted contents data by using the encryption key contained in the contents management information.
3 Assignments
0 Petitions
Accused Products
Abstract
Upon receiving an input of a request to move data to an external recording medium, a first information apparatus: transfers to record contents data after performing conversion under compression; encrypts the contents data and stores it in a concealment area of an internal recording medium; transfers to record the contents management information containing key information to the external recording medium; and deletes the encryption key. A second information apparatus: obtains the contents management information from the external recording medium and searches the network; obtains the encrypted contents data from the first information apparatus that holds the contents data concerned; and decrypts the encrypted contents data by using the encryption key contained in the contents management information.
41 Citations
14 Claims
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1. An information network system, comprising a first information apparatus and a second information apparatus, wherein
the first information apparatus comprises: -
a first internal recording medium for storing contents data; a first interface which transfers data relating to the contents data recorded in the first internal recording medium to an external recording medium when the external recording medium is attached to the first information apparatus; and a first transmission/reception unit for connecting the first information apparatus to a network, and the second information apparatus comprises; a second internal recording medium for storing contents data; a second interface; and a second transmission/reception unit for connecting the second information apparatus to a network, wherein; the first internal recording medium comprises an area for storing the contents data and a secured area for storing various kinds of data with limited accessibility, the first information apparatus is configured to;
upon receiving a request to move the contents data to the external recording medium while the external recording medium is being attached to the first information apparatus,read out the contents data from the first internal recording medium and transfer the read contents data to the external recording medium after performing compression-conversion to the read contents data; encrypt the contents data by using an encryption key to be stored in the secured area of the first internal recording medium; record contents management information that contains key information relating to the encryption key in the external recording medium; and then delete the key information relating to the encryption key, and the second information apparatus is configured to;
when the external recording medium that holds the compression-converted contents data is attached to the second information apparatus,obtain the contents management information from the external recording medium and search the network by using the obtained contents management information to find out the first information apparatus that holds the encrypted contents data corresponding to the contents management information; obtain, through the network, the encrypted contents data from the found first information apparatus; and decrypt the obtained encrypted contents data by using the encryption key contained in the contents management information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An information network system, comprising a first information apparatus and a second information apparatus, wherein
the first information apparatus comprises: -
a first internal recording medium for storing contents data; a first interface which is configured to transfer data relating to the contents data recorded in the first internal recording medium to an external recording medium when the external recording medium is attached to the first information apparatus; and a first transmission/reception unit for connecting the first information apparatus to a network, and the second information apparatus comprises; a second internal recording medium for storing contents data; a second interface; and a second transmission/reception unit for connecting the second information apparatus to a network, wherein; the first internal recording medium comprises an area for storing the contents data and a secured area for storing various kinds of data with limited accessibility, the first information apparatus is configured to;
upon receiving, from the second information apparatus through the network, a request to move the contents dataencrypt the contents data; generate contents management information that contains key information relating to an encryption key used for encryption;
transferstransfer the encrypted contents data along with the contents management information to the second information apparatus through the network; delete the key information relating to the encryption key from the contents management information after transfer; and store the management contents information from which the key information is deleted and the encrypted contents data to the secured area, and the second information apparatus is configured to;
after requesting, to the first information apparatus through the network, movement of the contents data and receiving the encrypted contents data along with the contents management information from the first information apparatus,obtain the encryption key from the key information contained in the received contents management information, and then decrypt the received encrypted contents data by using the encryption key. - View Dependent Claims (13)
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14. An information apparatus, comprising:
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an internal recording medium for storing contents data; a recording and reproducing unit for recording the contents data to the internal recording medium and reproducing the content data; an interface for transferring data relating to the contents data recorded in the internal recording medium to an external recording medium when the external recording medium is attached to the information apparatus a transmission and reception unit for transmitting and receiving data between a network; and a control unit, wherein; the internal recording medium comprises an area for storing the contents data and a secured area for storing various kinds of data with limited accessibility, and the control unit comprises; a compressor for reading out the contents data from the internal recording medium by controlling the recording and reproducing unit, and performing compression-conversion of the contents data, responsive to a request to move the contents data to the external recording medium; a first transfer device for transferring the compression-conversion contents data to the external recording medium trough the interface; an encryption device for encrypting the contents data; a storage device for storing the encrypted contents data to the secured area of the internal recording medium; a second transfer device for transferring contents management information containing key information relating to an encryption key that is used for encrypting the contents data to the external recording medium through the interface; a deleting device for deleting the key information after the contents management information is transferred to record to the external recording medium; a searching device for obtaining the contents management information from the external recording medium that holds the compression-conversion contents data, and searching another information apparatus that is connected to the network through the transmission and reception unit by using the obtained contents management information; an acquisition device for, when the another information apparatus which hold the encrypted contents data corresponding to the contents management information is found through the search of the network, obtaining the encrypted contents data from the another information apparatus through the network; and a decryption device for decrypting the encrypted contents data obtained by the acquisition device by using the encryption key contained in the contents management information.
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Specification