| 摘要 |
Document collaboration may be implemented by executing an access interest specification phase. The access interest specification phase may include receiving access requests from collaboration participants for access to a document instance, the access requests specified using a document schema of the document instance and referencing at least one schema portion for access to a corresponding document instance portion based thereon, determining a common access interest group of the collaboration participants, based on the access requests, access credentials of the collaboration participants, and on an access control policy specified in terms of the access credentials, and providing a control data block to the participants of the common access interest group including information for generating a common secret key that is common to the participants of the common access interest group. The document collaboration may further be implemented by executing a collaboration phase. The collaboration phase execution may include encrypting the document instance portion using the access control policy, and providing access to the document instance for access to the document instance portion by an accessing participant of the common access interest group, the access including decryption of the document instance portion using the common secret key.
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