Content reception apparatus and method, and content transmission apparatus and method

A content reception method comprising:

• performing first authentication with a content transmission apparatus;
• receiving content from the content transmission apparatus;
• recording the received content;
• performing a process including second authentication with the content transmission apparatus;
• and
• reproducing the recorded content.

A content transmission apparatus comprising:

• a communication unit configured to communicate with a content reception apparatus;
• an authenticating unit configured to perform mutual authentication and shares an exchange key with the content reception apparatus;
• a content providing unit configured to transmit the content encrypted with the exchange key from the communication unit to the content reception apparatus;
• and
• a managing unit configured to store the exchange key and a label of the exchange key associated with identification information of the content reception apparatus, and stores a connection record including a lock flag indicating whether to discard the record of the exchange key and the label.

A content transmission method comprising:

• performing first authentication with a content reception apparatus;
• performing second authentication with the content reception apparatus by transmitting content to the content reception apparatus;
• and
• setting a lock flag in a corresponding connection record when a label of an exchange key shared in the second authentication is received from the content reception apparatus.