Certificate handling for digital rights management system
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United States of America Patent
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Jan 28, 2003
Issued Date -
N/A
app pub date -
Oct 7, 1998
filing date -
Mar 4, 1998
priority date (Note) -
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Abstract
A delivery system for managing security keys uses three key pairs to establish, register, move and revoke rights in a device to view protected information. The first and second key pairs cooperate to establish a secure certificate containing a device public and private key, and the pairs of keys are manipulated to install the appropriate keys in the device and the associated authentication server without ever exposing the keys. Thereafter, in the event of a need to authorize a new device to view content associated with a prior, authorized device, the key pairs are used to revoke the rights of an old device and establish identical viewing rights in the new device.
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