Trusted Computing: Difference between revisions

Revision as of 04:31, 19 July 2005

Revision as of 04:49, 20 July 2005

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Trusted computing can be used for DRM. An example could be downloading a music file from a band: the band could come up with rules for how their music can be used. For example, they might only want the user to play the file three times a day without paying more money. Also, they could use remote attestation to only send their music to a music player that enforces their rules: sealed storage would prevent the user from opening the file with another player that did not enforce the restrictions. Memory curtaining would prevent the user from making an unrestricted copy of the file while it's playing, and secure output would prevent capturing what is sent to the sound system.

Once digital recordings are converted to analog signals, that (perhaps degraded) signal could be recorded by conventional means, such as by connecting an audio recorder to the card, instead of speakers, to the speakerscard, or by recording the produced sound with a microphone.

Without remote attestation, this problem would not exist. The user could simply download the song with a player that did not enforce the band's restrictions, or one that lets him convert the song to an "unrestricted" format such as [[MP3]].