摘要:
There is provided an unauthorized terminal inferring device (100) device that is connected to a plurality of communications terminal devices (IDi) by a multi-hop network. The device (100) includes a communications terminal information control portion (120) that controls identification information and key information for the communications terminal devices (IDi), a transmission portion (160) that transmits challenge information to the devices (IDi), a receiving portion (170) that receives from the devices (IDi) response information that corresponds to the challenge information, a response information verification portion (130) that verifies whether or not an authenticator that is contained in the response information is correct, and an unauthorized terminal device inferring processing portion (140) that, in a case where the verification result indicates that the response information is not legitimate, requests that each of the devices (IDi) retransmit received and generated information, then infers which communications terminal device performed the unauthorized behavior.
摘要:
A communication method in which an operation, such as authentication, required when a new communication terminal participates in a mesh network is carried out in a more efficient manner. A second communication terminal that has already established an adjacent communication link with at least two first communication terminals, out of a plurality of communication terminals, distributes an adjacent terminal list including terminal identifiers of the first communication terminals along with a temporal key generated by the second communication terminal. One of the first communication terminals that received the adjacent terminal list and the temporal key distributes adjacent registration information, which is generated using a second temporal key. The other one of the first communication terminals that received both the adjacent terminal list and the adjacent registration information determines whether the terminal identifier of one of the first communication terminals is included in the adjacent terminal list, and whether the first temporal key distributed along with the adjacent terminal list matches with the second temporal key used for generating the adjacent registration information. If both determination results are affirmative, one of the first communication terminals is authenticated.
摘要:
This invention provides a message authentication system including: a message sending device having a send notice information generating unit that generates a first authentication code to certify a message and a second authentication code to certify the first authentication code and that sends the message and an authentication code generation key after authenticating reception certification information for the send notice information from a message receiving device; and including the message receiving device having a reception certification information generating unit that generates the reception certification information to certify the receiving of the send notice information, a first authentication code authenticating unit that authenticates the first authentication code by using the second authentication code and the authentication code generation key, a message authenticating unit that authenticates the message by using the authenticated first authentication code and the authentication code generation key. Thereby, the data capacity held by a node can be reduced.