Data terminal device that can easily obtain and reproduce desired data
First Claim
1. A data terminal device receiving encrypted data that is an encrypted version of data and a license key that is a decryption key used to decrypt said encrypted data to obtain said data from a portable terminal apparatus that receives said encrypted data and said license data, and transmitting said received encrypted data and license data to a data recording device, and reproducing said encrypted data from said data recording device, said data terminal device comprising:
- a first interface unit to transfer data with said portable terminal apparatus, a second interface unit to transfer data with said data recording device, an authentication data hold unit storing a pre-assigned authentication data to be output to said data recording device, a decryption processing unit decrypting said encrypted data using said license key, and a control unit, wherein said control unit receives said encrypted data and said license data from said portable terminal apparatus via said first interface unit to transmit the received encrypted data and license key to said data recording device via said second interface unit in a data distribution mode, and wherein said control unit transmits said authentication data to said data recording device via said second interface unit to receive said license key and said encrypted data transmitted from said data recording device in response to authentication of said authentication data in said data recording device, and applying the received license key and encrypted data to said decryption processing unit in a data reproduction mode.
1 Assignment
0 Petitions
Accused Products
Abstract
A remote controller is connected to a cellular phone. A memory card is loaded in the remote controller. A headphone is connected to the remote controller. The cellular phone receives encrypted content data and a license key used to decrypt the encrypted content data from a distribution server and transmits the encrypted content data and license key to the remote controller. The remote controller records the received license key and encrypted content data into a memory card. The remote controller reads out and reproduces the license key and encrypted content data from the memory card for output to the headphone. Thus, a data terminal device of high usability that allows the user to easily obtain and reproduce the desired data can be provided.
119 Citations
11 Claims
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1. A data terminal device receiving encrypted data that is an encrypted version of data and a license key that is a decryption key used to decrypt said encrypted data to obtain said data from a portable terminal apparatus that receives said encrypted data and said license data, and transmitting said received encrypted data and license data to a data recording device, and reproducing said encrypted data from said data recording device, said data terminal device comprising:
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a first interface unit to transfer data with said portable terminal apparatus, a second interface unit to transfer data with said data recording device, an authentication data hold unit storing a pre-assigned authentication data to be output to said data recording device, a decryption processing unit decrypting said encrypted data using said license key, and a control unit, wherein said control unit receives said encrypted data and said license data from said portable terminal apparatus via said first interface unit to transmit the received encrypted data and license key to said data recording device via said second interface unit in a data distribution mode, and wherein said control unit transmits said authentication data to said data recording device via said second interface unit to receive said license key and said encrypted data transmitted from said data recording device in response to authentication of said authentication data in said data recording device, and applying the received license key and encrypted data to said decryption processing unit in a data reproduction mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A headphone device comprising:
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a first speaker unit including a power source, and a second speaker unit including a detach unit to attach or detach a data recording device, and a data terminal circuit, wherein said data terminal circuit comprises a first interface unit to transfer data with a portable terminal apparatus that receives encrypted data and a license key used to decrypt said encrypted data, a second interface unit to transfer data with said data recording device, an authorization data hold unit storing authentication data with respect to said data recording device, a decryption processing unit decrypting said encrypted data using said license key, and a control unit, wherein said control unit receives said encrypted data and said license key from said portable terminal apparatus via said first interface unit to send the received encrypted data and license key to said data recording device via said second interface unit in a data distribution mode, wherein said control unit transmits said authentication data to said data recording device via said second interface unit, and receives said license key and said encrypted data transmitted from said data recording device in response to authentication of said authentication data in said data recording device to apply the received license key and encrypted data to said decryption processing unit in a data reproduction mode. - View Dependent Claims (11)
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Specification