Kazuo Takada

TL;DR: In this article, a communication device for performing communication by employing first and second communication units, including a reception unit for receiving a communication packet including a random number generated for every connection with another communication device, a certificate calculated with the random number, and authentication method information indicating whether or not an authentication method at the second communication unit is compatible with the public key system, through first communication unit.

TL;DR: In this paper, the authors propose an information processing device has a first transmitting unit to connect a first other information processor and second other information processing processor and transmit the content via the connection; a first receiving unit to receive a master request that requests an upgrade to a master from the first other processor from the second processor; a second transmitting unit, upon receiving the master request, disconnects the connection with the second other processor after transmitting the identification information of the first processor.

TL;DR: In this paper, the authors proposed a handover-based communication apparatus for transmitting data at high speed by utilizing handover, which includes a first communication unit corresponding to a low-speed first communication system, and a second communication unit corresponding to a second communications system faster than the first one.

TL;DR: In this article, the authors provided a communication apparatus including a first communication unit having a first communications range, a second communication unit with a second communications range wider than the first communication range, and a control unit which transmits a request signal for starting communication via the second communications unit from the first communications unit to another communication apparatus.

TL;DR: In this paper, the authors provided an information processing system including a service provider unit, a communication terminal and a unit communication control section, where the communication terminal includes a terminal first communication section, a terminal second communication section to communicate with the information processing unit through a first communication channel.