Method and apparatus for transmitting content data and recording and/or reproducing apparatus
AssigneeSony Corporation
InventorsYoichiro Sako, Tatsuya Inokuchi, Shunsuke Furukawa
Life of this patent
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Abstract
A data transmission method and apparatus for transmitting data such as encrypted content data, wherein a device that is to be a destination of transmission is authenticated and, if the device has not been authenticated, encrypted data read out from a storage unit is decrypted to give decoded data, which then is re-encrypted, based on innate key data acquired from the device that is to be the destination of transmission, to give re-encrypted data. The re-encrypted data is then transmitted to the device that is to be a destination of transmission.
Claims11
A data transmitting method comprising:
- authenticating a device that is to be a destination of transmission;
- selectively outputting encrypted data read out from a storage unit, the selection being controlled by an authentication result of the authenticating step;
- decoding encrypted data read out from a storage unit when the device that is to be the destination of transmission has been authenticated;
- re-encrypting the decoded data based on innate key data acquired from the device that is to be the destination of transmission;
- and
- sending the re-encrypted data to the device that is to be the destination of transmission when the device that is to be the destination of transmission has been authenticated, and the encrypted data to the device that is to be the destination of transmission when the device that is to be the destination of transmission has not been authenticated.
A data outputting method comprising:
- authenticating a device that is to be an outputting destination;
- checking whether the device that is to be the outputting destination has been authenticated;
- and
- selectively outputting encrypted data read out from a storage unit, the selection being controlled by an authentication result of the authenticating step;
- decoding encrypted data read out from the storage unit when the device that is to be the destination of transmission has been authenticated;
- re-encrypting the decoded data based on innate key data acquired from the device that is to be the destination of transmission;
- and
- sending the re-encrypted data to the device that is to be the destination of transmission when the device that is to be the destination of transmission has been authenticated, and the encrypted data to the device that is to be the destination of transmission when the device that is to be the destination of transmission has not been authenticated.
Dependencies are inferred from the claim text.