The present invention discloses a system block chain Access Control Method and apparatus can be realized after the user login is successful, according to the user's information to generate user-tree root privileges, permissions tree to user roles, permissions, and block chain the layers for the child node; when the user operates the block chain, notification control module corresponding to the user's permission to traverse the tree traversal based on the results of the control module determines whether the user has the legal authority to block the chain operation, if the allowed to operate, without the prohibited operation. According to the present invention permissions tree for flexible access control rights management, because the authority has a tree-rise, quickly update the characteristics, can reduce the consumption of resources authority, taking into account the guaranteed rights management efficiency.
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