초록 ▼

A system for tracking usage of digital content on user devices. Electronic stores coupled to a network sell licenses to play digital content data to users. Content players, which receive from the network the licensed content data, are used to play the licensed content data. Additionally, a logging s

A system for tracking usage of digital content on user devices. Electronic stores coupled to a network sell licenses to play digital content data to users. Content players, which receive from the network the licensed content data, are used to play the licensed content data. Additionally, a logging site that is coupled to the network tracks the playing of the content data. In particular, the logging site receives play information from the network, and the play information includes the number of times that the content data has been played by the associated content player. Also provided is a method for tracking usage of digital content on user devices. According to the method, a license to play digital content data is sold to a user, and the licensed content data is transmitted to a content player for the user. Further, information is transmitted to a logging site whenever the content data is played by the content player or copied from the content player to an external medium so that usage of the licensed content data can be tracked.

대표청구항 ▼

1. A digital content data player for playing digital content data stored on a storage device and for providing usage information related to the digital content to a remote site, said data player comprising:an interface for connecting with a storage device; a receiver for receiving previously encrypt

1. A digital content data player for playing digital content data stored on a storage device and for providing usage information related to the digital content to a remote site, said data player comprising:an interface for connecting with a storage device; a receiver for receiving previously encrypted digital content data which has been encrypted with a first encrypting key, and the receiver receiving a from a clearing house an encrypted first decrypting key which has been encrypted with an encrypting key from the digital content player; a tamper resistant environment for decrypting the first decrypting key with a decrypting key from the digital content player, wherein the tamper resistant environment forming reencrypted digital content data by reencrypting the digital content data with a locally generated digital content player encrypting key, wherein the previously encrypted digital content has been decrypted with the first decrypting key, and the tamper resistant environment storing the reencrypted digital content on the storage device; a player coupled to the interface for decrypting and playing the stored reencrypted digital content data and generating usage information describing the reencrypted digital content; and a transmitter for transmitting the usage information to a remote logging site, the usage information informing the remote logging site of at least one of a playing of the reencrypted digital content data by the player and a copying of at least part of the reencrypted digital content data from the storage device to an external medium.