METADATA TREE WITH KEY ROTATION INFORMATION
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United States of America Patent
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app pub date -
Sep 12, 2012
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Aug 15, 2012
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Abstract
A method performed by a processing system includes identifying a first node in a metadata tree of a patient that corresponds to an encrypted electronic health record in an encrypted data store and preventing a portion of the first node from being decrypted with a node key of a first healthcare participant in response to a second node of the metadata tree including key rotation information that indicates that the node key has been revoked by a second healthcare participant.
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