Abstract: A control device comprising, a control section configured to control an authentication process of performing a process related to device authentication together with at least one communication device on a basis of information included in a signal received through wireless communication with the communication device, wherein the control section performs control in such a manner that a signal including authentication information that is information to be used for the authentication process is transmitted to the communication device through the wireless communication, the authentication information varying depending on signal types, which are types of roles of signals to be transmitted to the communication device in the authentication process.

Abstract: Provided is a communication system including: a first device configured to transmit encrypted information that is encrypted by using a first encryption key; and a second device configured to execute a predetermined process based on the encrypted information obtained from the first device, and a second encryption key that is common to the first encryption key. The first device includes a first change section configured to change the first encryption key in the case where a first condition is satisfied. The second device includes a second change section configured to change the second encryption key in the case where a second condition is satisfied, the second condition being common to the first condition.

Abstract: There is provided an antenna device comprising: a chip antenna arranged on a substrate; and a metal element arranged on the same substrate as the chip antenna, wherein the metal element is arranged such that a longitudinal direction of the metal element is vertical with respect to the substrate in a direction in which a current flows in the chip antenna.

Abstract: There is provided an antenna device comprising: a pattern antenna formed on a substrate; and a metal element arranged on the same substrate as the pattern antenna, wherein the metal element is arranged such that a longitudinal direction of the metal element is vertical with respect to the substrate near an area surface in which a current flows in the pattern antenna.

Abstract: There is provided an antenna device comprising: a chip antenna that is disposed on a substrate; and a metal element that is disposed above or below the chip antenna in a direction orthogonal to a plane of the substrate.

Abstract: A control device and control method prevent an unnecessary authentication process from being executed. The control device includes a control section configured to perform an authentication process of authenticating another device by using information obtained through communication with the other device. In the case where a predetermined condition is satisfied, the control section performs control in such a manner that the authentication process is not performed.

Abstract: [Object] To provide a communication system that makes it possible to improve security. [Solution] Provided is a communication system including: a first device configured to transmit encrypted information that is encrypted by using a first encryption key; and a second device configured to execute a predetermined process based on the encrypted information obtained from the first device, and a second encryption key that is common to the first encryption key. The first device includes a first change section configured to change the first encryption key in the case where a first condition is satisfied. The second device includes a second change section configured to change the second encryption key in the case where a second condition is satisfied, the second condition being common to the first condition.

Abstract: There is provided a determination device comprising a determination section configured to determine an area where a portable device is positioned, on a basis of wireless communication between a plurality of first wireless communication devices installed at different portions of a mobile object and a second wireless communication device installed in a portable device, in conformity with a designated communication standard, wherein the determination section determines the area where the portable device is positioned, by using different determination expressions depending on the respective first wireless communication devices, each of which has successfully calculated an RSSI with regard to a signal received from the second wireless communication device through wireless communication compliant with the designated communication standard and a determination target area.

Abstract: There is provided a determination device comprising a determination section configured to determine an area where a portable device is positioned, on a basis of wireless communication between a plurality of first wireless communication devices disposed at different portions in a target space where a plurality of areas is defined and a second wireless communication device installed in a portable device, in conformity with a designated communication standard, wherein the determination section determines the area where the portable device is positioned, by using different determination expressions depending on the respective first wireless communication devices, each of which has successfully calculated an RSSI with regard to a signal received from the second wireless communication device through wireless communication compliant with the designated communication standard and a determination target area.

Abstract: A communication device achieves inter-device authentication with high accuracy and high responsiveness. The communication device includes a control section configured to execute a process related to transmission or reception of a first authentication signal and a second authentication signal that are necessary for a first authentication process for authentication of another communication device. The control section starts execution of a second authentication process for different authentication from the first authentication process, after transmission or reception of the first authentication signal and before transmission or reception of the second authentication signal.

Abstract: [Object] To provide a mechanism that makes it possible to avoid inconveniences when the authentication process has abnormality. [Solution] A communication device comprising a control section configured to control each of a first process that achieves a prescribed function, and a second process that authenticates another communication device and that is different from the first process, wherein the control section performs control in such a manner that the second process is not performed in a case where abnormality is recognized.

Abstract: A control device including a control section configured to obtain distance measurement information, and perform a process according to the obtained distance measurement information, the distance measurement information being information that is obtained by transmitting and receiving a distance measurement signal between at least two communication devices, and the distance measurement signal being a signal that is transmitted and received to measure a distance between the two communication devices.

Abstract: A determination device comprising a determination section configured to determine whether a portable device is positioned in a first area or a second area on a basis of results of ranging based on wireless communication between at least two first wireless communication devices and a second wireless communication device, the at least two first wireless communication devices being disposed with a boundary arrangement interposed therebetween, the boundary arrangement being arranged at a boundary between the first area and the second area, the second wireless communication device being installed in the portable device, wherein the determination section determines whether the portable device is positioned in the first area or the second area on a basis of a difference between ranging value calculated by first wireless communication device disposed in the first area and ranging value calculated by first wireless communication device disposed in the second area.

Abstract: There is provided a wireless communication device, including a first wireless communication unit that performs first wireless communication with another communication device, the first wireless communication selectively using a plurality of channels complying with a first communication standard, a second wireless communication unit that performs second wireless communication with the another communication device, the second wireless communication complying with a second communication standard different from the first communication standard, and a control unit that controls the first wireless communication by the first wireless communication unit and the second wireless communication by the second wireless communication unit, in which the control unit controls the second wireless communication unit to start standby for receiving a signal used for the second wireless communication after a specified period of time, on the basis of reception of a connection request related to the first wireless communication by t

Abstract: A control device that communicates with a first communication device and a second communication device includes: a determination section configured to determine a position of a terminal on a basis of a first ranging result obtained from a radio wave communicated between the first communication device and the terminal and a second ranging result obtained from a radio wave communicated between the second communication device and the terminal, wherein the first communication device is disposed at a first position where it is difficult to directly receive the radio wave between a first area and a second area that are separated by a first member including material through which it is difficult for the radio wave to penetrate, and the second communication device is disposed at a second position where it is possible to directly receive the radio wave between the first area and the second area.

Abstract: A wireless communication device having a control section configured to control transmission and reception of a wireless signal by an antenna in conformity with a designated communication standard, wherein the control section controls a timing of causing the antenna to transmit a second signal in response to a first signal received by the antenna, on a basis of fixed time and delay time related to internal transfer in the wireless communication device, the fixed time being decided in advance.

Abstract: To realize more secured Authentication while convenience is secured. There is provided a communication device including a control unit configured to control a process relating to transmission or reception of a first authentication signal and a second authentication signal used for a first authentication process that is authentication between the communication device and another communication device, in which the control unit further controls a second authentication process that is authentication different from the first authentication process and starts a process relating to transmission or reception of signals used for a second authentication process that is authentication different from the first authentication process before transmission or reception of the first authentication signal.

Abstract: There is provided a communication device comprising: a control unit configured to control ranging with a wireless signal in conformity with a regulated communication standard, wherein the control unit controls output intensity of a data transmission signal that has a payload based on reception sensitivity for a plurality of ranging signals transmitted to and received from other communication devices.

Abstract: To provide a mechanism capable of matching timings at which communication is performed between devices. A communication device for performing wireless communication with another communication device, the communication device comprising: a first wireless communication unit configured to perform communication conforming to a first wireless communication standard; a second wireless communication unit configured to perform communication conforming to a second wireless communication standard; and a control unit configured to control the first wireless communication unit so that the first wireless communication unit transmits, a plurality of times, a first signal, the first signal being a signal conforming to the first wireless communication standard and being a signal including setting information that is information for setting a timing at which the second wireless communication unit performs communication.

Abstract: A control device that communicates with a first communication device and a second communication device, the control device comprising: a determination section configured to determine a position of a terminal on a basis of a first ranging result obtained from a radio wave communicated between the first communication device and the terminal and a second ranging result obtained from a radio wave communicated between the second communication device and the terminal, wherein the first communication device is disposed at a first position where it is difficult to directly receive the radio wave between a first area and a second area that are separated by a first member including material through which it is difficult for the radio wave to penetrate, and the second communication device is disposed at a second position where it is difficult to directly receive the radio wave between the first area and the second area.