| 摘要 |
<p>PROBLEM TO BE SOLVED: To execute equipment registration processing for an out-of-house access beforehand between with a content transmission device, to enable viewing of an in-house content from out-of-house only by a content reception device that succeeds in the processing.SOLUTION: The content transmission device performs authentication based on a first authentication method to share first key information between with a content reception device connected to a network, or also performs authentication based on a second authentication method to share second key information. If an authentication request received from the content reception device is an authentication request according to the second authentication method, when the reception device is an out-of-house content reception device, the content transmission device determines whether equipment information included in the authentication request is already registered as equipment information of the content reception device that performs authentication based on the first authentication method to enable accessing from out-of-house. If the equipment information is registered, the content transmission device performs authentication of the content reception device based on the second authentication method, to encrypt and transmit a content using key information generated based on the second key information.</p> |
