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Communication device, method and program

A technology of a communication device and a communication method, applied in the security field, can solve the problem of not being able to detect deletion and the like

Inactive Publication Date: 2008-08-27
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, in the prior art described above, it is impossible to detect that the security-related information has been deleted in the node device of the communication partner.

Method used

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  • Communication device, method and program
  • Communication device, method and program
  • Communication device, method and program

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Embodiment Construction

[0042] Hereinafter, although the present invention will be described with reference to the embodiments shown in the drawings, it goes without saying that the present invention is not limited to the embodiments described later.

[0043] FIG. 1 is a schematic diagram of an embodiment of a network 10 to which a communication device 12 is connected. In the present embodiment, the communication device 12 is connected to a router 14 via a switch (not shown) to form a network 10 . The communication device 12 (adjacent node) partner that can form an access link (adjacent node) through the protocol of the data link layer constitutes the link 16 and the link 18 respectively, and the network layer that the router 14 is referred to in the OSI reference model, etc. At the / transport layer level, network control is performed, and a network layer / transport layer protocol such as TCP (Transmission Control Protocol) / IP or UDP (User Datagram Protocol) / IP is appropriately used to connect the lin...

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PUM

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Abstract

To transmit data while protection security via the network, the invention provides a communication device (12) connected to the network, and used for carrying out data communication with external devices, the communication device (12) exchanges security common intelligence for secure communication among external devices, detects whether the security common intelligence disappears on one of exchange means (44) held in storing means, communication device (12) and external device, comprising a reconfirm judging means (48) for re-exchanging new security common intelligence on the exchanging means(44) when detecting the security common intelligence disappears.

Description

technical field [0001] The present invention relates to security technology, and specifically relates to a communication device, a communication method, and a program for performing data communication through a network while maintaining security. Background technique [0002] IPsec (Security Architecture for Internet Protocol) communication, a secure communication standard used by VPN (Virtual Private Network) or Ipv6 (internet Protocol Version 6), provides process control, communication data integrity, and confidentiality assurance or data at the IP layer level It is a basic technology for secure communication that can properly prevent alteration, eavesdropping, impersonation, etc. in the transmission route. [0003] In IPsec communication, security including information (encryption, authentication protocol, secret key) for ensuring the integrity or confidentiality of communication data between communication devices (nodes) to start communication before secure communication...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L9/36H04L9/08H04L12/66
Inventor 相川智慎
Owner RICOH KK