System, data management method, and program
AssigneeNEC Corporation
InventorsKazue SAKO, Isamu TERANISHI
Life of this patent
Estimating the term…
Abstract
A system includes a plurality of nodes, an individual one of which transmits data to which a group signature is attached, and a plurality of management servers that are directly connected to each other. An individual one of the plurality of management servers includes a ledger for managing data received from the nodes. Addition of data to the ledger of at least one of the plurality of management servers is reflected on the ledgers of the other management servers.
Claims15
A system, comprising:
- a plurality of nodes, an individual one of which transmits data to which a group signature is attached;
- and
- a plurality of management servers that are directly connected to each other;
- wherein an individual one of the plurality of management servers includes a ledger for managing data received from the nodes;
- and
- wherein addition of data to the ledger of at least one of the plurality of management servers is reflected on the ledgers of the other management servers.
A system, comprising:
- a plurality of nodes, an individual one of which belongs to a group;
- a plurality of node management servers, an individual one of which manages a node(s) that belongs to a corresponding one of the groups;
- and
- a certificate management server that issues a member certificate to an individual one of the plurality of nodes, the member certificate being used when the individual one of the plurality of nodes generates a group signature, and releases a management-agent public key;
- wherein an individual one of the plurality of node management servers releases a privileged-agent public key;
- and
- wherein an individual one of the nodes generates a group signature to be attached to data, by using at least the management-agent public key and the privileged-agent public keys released by the respective node management servers.
A data management method in a system including a plurality of nodes and a plurality of management servers that are directly connected to each other and that include ledgers for managing data received from the nodes, the data management method, comprising:
- causing at least one of the nodes to transmit data to which a group signature has been attached;
- causing at least one of the management servers to receive the data to which the group signature has been attached;
- causing the at least one of the management servers to add the received data to the corresponding ledger;
- and
- causing the other management servers to reflect addition of the data to the ledger by the at least one of the plurality of management servers on the corresponding ledgers.
A non-transitory computer-readable recording medium storing a program, executed by a computer mounted on a management server that is directly connected to other management servers and that includes a ledger for managing data received from a node(s), the program causing the computer to perform processing for:
- receiving data, which is transmitted by the node(s) and to which a group signature(s) has been attached;
- adding the received data to the ledger;
- and
- reflecting addition of data to the ledger by at least one of the other management servers on the ledger of the management server.
Dependencies are inferred from the claim text.