| 摘要 |
PROBLEM TO BE SOLVED: To flexibly control access to an electronic document even for a participant group which is too large to be local. SOLUTION: When a local document management device 2a in decentralized environment receives an operation instruction for an electronic document, an access control means 4 judges whether or not an operator participates directly in the electronic document by retrieving communication information records (participant information 7, electronic document information 8, and communication link information 9) and gives permission when the operator participates. If not, it is judged whether or not the operator participates similarly with other records in link relation and permission is decided. Therefore, when the electronic document to be operated is related by a link of communication link information 9, the operator can operate as a direct participant and a request made by an operator having no link relation is rejected. |
