DIGITAL RIGHT MANAGEMENT METHOD, APPARATUS, AND SYSTEM
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United States of America Patent
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Issued Date -
Jul 4, 2013
app pub date -
Dec 28, 2012
filing date -
Dec 28, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A digital right management method, including: generating, by a first user equipment having access right to shared digital contents, a common public key based on one or more public keys of one or more second user equipments intended to share the digital contents, respectively; encrypting, by the first user equipment, a key of the digital contents with the common public key to generate a ciphertext of the key of the digital contents; generating, by the first user equipment, from the ciphertext a new authorization certificate corresponding to the digital contents; and transmitting, by the first user equipment, the new authorization certificate and the digital contents to the second user equipments to instruct the second user equipments to share the digital contents in accordance with the new authorization certificate.
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