Panasonic Corporation

Yibo Zhang

Takeshi Kokado

Atsuhiro Tsuji

Provided is a communication device which securely registers a slave unit. A secret address generation and setup section generates a secret address generator, and a secret address of the slave unit used temporarily instead of a unique address of the slave unit based on the secret address generator and identification information of the slave unit. A second communication section transmits to the slave unit a registration start notice containing the secret address generator by broadcast. A registration process section generates a registration authentication key; generates a unique key of the slave unit by transmitting/receiving, to/from the slave unit, unique key generation information encrypted using the registration authentication key; receives, from the slave unit, the unique address of the slave unit encrypted using the registration authentication key; and stores the identification information in association with the unique address and the unique key of the slave unit in the registration information storing section.

Master unit and slave unit

A communication apparatus and authenticating method prevent mistaken authentication at initial authentication in a connection between communication apparatuses. The communication apparatus includes an authentication processing unit which manages each state of the communication apparatus. The states include an authentication initiation permissible state, an authentication initiation impermissible state, an authentication initiation state, an authenticating state, an authentication successful state, an authentication unsuccessful state and an authentication completed state. Additionally, the authentication processing unit performs authentication with another communication apparatus, and stops the authentication when a plurality of authentication messages is received while in the authentication initiation state and the authenticating state. A conflict detection unit detects that a plurality of authentication messages has been received; a display unit displays each state; and an input unit accepts the state change from authentication initiation permissible to authentication initiation (an authentication initiation operation), and from authentication successful to authentication completed (an authentication completion operation).

Communication apparatus and authenticating method

A communication device, a communication system and an authentication system for preventing a disguising act by an illegal man-in-the-middle and improving the safety and certainty of authentication processing are provided. A slave () transmits an authentication request including device information to a master (). The master () receives the authentication request and displays the device information included in the authentication request on a screen of a display section (). The user visually checks the device information displayed on the screen of the display section(), determines whether or not to verify the authentication, and instructs the master () of the determination result via an input section (). The master (), instructed to verify or not to verify the authentication, transmits a response in accordance with the instruction to the slave ().

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Osaka, Japan

Yibo Zhang