DIGITAL RIGHTS MANAGEMENT METHOD AND APPARATUS OF MOBILE TERMINAL
First Claim
1. A digital rights management method of a mobile terminal for playing a right protected content with a time-constrained license, the method comprising:
- detecting a playback command for playing a right protected content;
determining whether a previously stored reference parameter exists; and
testing, when the previously stored reference parameter exists, validity of a license of the right protected content with reference to the reference parameter and a local time.
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Accused Products
Abstract
A DRM method and apparatus of a mobile terminal is provided for protecting unauthorized use of a time-based DRM content and improving license validation reliability by providing a reliable reference time regardless of changes of local time and time zone. The digital rights management method of the present invention includes detecting a playback command for playing a right protected content, determining whether a previously stored reference parameter exists, which is generated using a reference time received from a server and a local time of the mobile terminal, and testing, when a previously stored reference parameter exists, validity of a license of the right protected content with reference to the reference parameter and the local time when the playback command is detected.
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Citations
16 Claims
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1. A digital rights management method of a mobile terminal for playing a right protected content with a time-constrained license, the method comprising:
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detecting a playback command for playing a right protected content; determining whether a previously stored reference parameter exists; and testing, when the previously stored reference parameter exists, validity of a license of the right protected content with reference to the reference parameter and a local time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A digital rights management apparatus of a mobile terminal, the apparatus comprising:
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a memory unit for storing at least one of a right protected content, a time-constrained license for playing the right protected content, and a reference time for defining an expiry time of the license; a right protected content playback module for replaying the right protected content with reference to the license; a clock module for providing a local time of the mobile terminal; an input unit for receiving an input of a local time change command; and a control unit for generating a reference parameter using a time when the license is acquired and the reference time, for applying, when the local time is changed in response to the local time change command, the changed time amount to the reference parameter, and for testing validity of the license with reference to the changed time amount-applied reference parameter. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification