A method and system for establishing a secure connection between stations are disclosed. The method includes that: 1) a switch device receives an inter-station key request packet sent by a first user terminal; 2) the switch device generates an inter-station key, constructs an inter-station key announcement packet and sends it to a second user terminal; 3) the switch device receives an inter-station key announcement response packet sent by the second user terminal; 4) the switch device constructs an inter-station key announcement response packet and sends it to the first user terminal; 5) the switch device receives an inter-station key announcement response packet sent by the first user terminal. The switch device establishes an inter-station key for the two stations which are connected to the switch device directly, by which the embodiments of the present invention ensure the confidentiality and integrality of user data between the stations.

Method and system for establishing secure connection between stations

The present invention discloses a method and system for secret communication between nodes in a wired Local Area Network (LAN). The method of secret communication between nodes in the wired LAN includes the following steps: 1) a sharing key is established; 2) the route probe is exchanged; 3) the data communication is classified; 4) the secret communication is processed among the nodes. According to the different communication situations among the nodes, the method of secret communication between nodes provided in the present invention can process the classification and select an appropriate secret communication strategy; compared with per-hop encryption, the calculation load of the exchange equipment is reduced, and the transmission delay of data packets is shortened; compared with the method that inter-station keys are established in pairs of nodes in order to protect the communication secret, the key number is reduced, and the key management is simplified.

Method and system for secret communication between nodes

PROBLEM TO BE SOLVED: To provide a data transfer system that improves safety and economical efficiency.SOLUTION: A data transfer system comprises: an ES node 10 that divides, when having received a transmission packet from a host terminal 1, original data included in the transmission packet into a plurality of pieces of segment data, packetizes each segment data to generate a segment packet, and transfers the segment packet; a plurality of OFS nodes 101, 102, 201, 202 that encrypt, when having received a segment packet, segment data mounted on the segment packet and transfer the encrypted segment packet; and an ES 11 for transferring a segment packet transferred by an OFS node to a host terminal 2.SELECTED DRAWING: Figure 1

Data transfer system

A method for establishing a secure network architecture, a method and system for secure communication are provided. The method for establishing a secure network architecture includes: 1) constructing the network architecture where the identities of nodes are legal, including: neighboring node discovery; performing identities certification and shared key negotiation between a node and the neighbor node; 2) constructing a secure switching device architecture, including: establishing a shared key between every two of the switch devices.

Method for establishing secure network architecture, method and system for secure communication

PROBLEM TO BE SOLVED: To solve an issue of load for a repeater when unique encryption key is used to each channel and an issue of vulnerability when a common encryption key is used to all channels in encryption communication network to which many nodes are connected. SOLUTION: Two kinds of encryption keys, a data key for data encryption and a session key for data key encryption, are used so that cipher communication with sufficient strength is realized while minimizing the load of a repeater. COPYRIGHT: (C)2009,JPO&INPIT

High-strength cipher communication system which minimizes load of repeater

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High-strength cipher communication system which minimizes load of repeater