Patent ID: 7958375

Claim:
A method of reproducing data, comprising the steps of downloading encrypted data associated with a recording medium and a key file including a first decryption key and a second decryption key, to a local storage, the first decryption key used for decrypting a data recorded on the recording medium, the second decryption key used for decrypting the downloaded data; constructing a virtual playlist by binding a playlist for the data recorded on the recording medium with a playlist for the downloaded data, the virtual playlist including reproducing information of the data recorded on the recording medium and the downloaded data; reading the first decryption key and the second decryption key by using a link information, the link information including identification information of the data recorded on the recording medium and the downloaded data and stored in the key file; decrypting the data recorded on the recording medium by using the first decryption key, and the downloaded data by using the second decryption key; and reproducing the data recorded on the recording medium and the downloaded data by using the constructed virtual playlist.