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Revocation list update for devices
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Method and system for registering a DRM client
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Downloadable security based on certificate status
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Enhanced authorization process using digital signatures
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Secure consumer programming device
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Encrypting a unique cryptographic entity
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Ticket-based implementation of content leasing
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Method and apparatus for delivering certificate revocation lists
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Method and apparatus for determining the proximity of a client device
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Method and apparatus for authorizing rights issuers in a content distribution system
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Method and apparatus for providing broadcast trigger messages
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Flexible pricing model for persistent content
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Access control and key management system for streaming media
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