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.

An approach is disclosed that receives a wireless request from a proximity key that is used to access a vehicle. The wireless request includes a key-GPS that is a set of Global Positioning Satellite (GPS) coordinates that correspond to the proximity key. A vehicle-GPS is retrieved at the vehicle with the vehicle-GPS being a set of GPS coordinates that correspond to the vehicle. A distance between the proximity key and the vehicle based is calculated on a difference between the key-GPS and the vehicle-GPS. The approach then determines whether to perform the request based on the calculated distance.

Passive entry systems, such as passive entry-passive start vehicle systems, using short-range wireless communication signals to determine a distance between nomadic devices and unlockable devices based on a round trip time of flight (TOF) measurement.

A method of secure access through a wireless connection is provided. The method includes detecting availability of an access control wirelessly by a mobile device. A predicted intent is determined of a user of the mobile device to have the access control open a lock. The method determines whether a relay attack is detected. Based on detection of the relay attack, a prompt to confirm an intent of the user of the mobile device to have the access control open a lock is determined. Based on non-detection of the relay attack, a lock actuator is activated through the access control to open the lock responsive to a credential based on affirmatively confirming the intent or the predicted intent.

The present invention is directed to a method for preventing a relay attack between a mobile phone and a starting device of an automobile, which allows to prevent stealing a vehicle. According to the invention, very specific movement profiles of an authorized driver or user are recognized and thereby it is prevented that an unauthorized user starts the vehicle and then steals it, in various application scenarios. This is based, among other things, on the underlying hardware components' sensor technology used. Further, the invention relates to an analogously arranged system arrangement and to a computer program product with control commands which implement the method or operate the system arrangement.

Systems and methods of measuring distance between two wireless devices by combining phase shift and time-of-flight measurements. A first wireless devices sends a first packet to the second wireless device. After receiving the first packet, the second wireless device sending to the first wireless device a second packet. After sending the second packet, the second wireless device sends a first continuous wave signal to the first wireless device. After receiving the first continuous wave signal, the first wireless device sends to the second wireless device a second continuous wave signal. The first wireless device then calculates a time-of-flight measurement based on a time between the first wireless device sending the first packet and receiving the second packet, and calculates a second measurement based on a phase shift of the first continuous wave signal and the second continuous wave signal, and combines the two measurements.

A method to determine a relay attack on an authorization system granting permission on using a resource, includes receiving a signal from an authentication device; determining, whether at least two copies of an authentication signal are included in the signal; and concluding on a relay attack if at least two copies of the authentication signal are identified in the signal.

[Object] To provide a novel and improved communication system and communication device that make it possible to reduce an amount of time from when communication with an external device is completed to when communication data corresponding to a communication result is output to another device.

[Solution] Provided is a communication system including: a communication device configured to transmit a selection solution that is selected depending on a result of first communication with an external device; and a control device configured to receive the selection solution from the communication device through second communication between the communication device and a communication partner that is different from the external device serving as a communication partner in the first communication.

A position estimation method for estimating a position of a mobile terminal includes: an acquisition step of acquiring distance values and radio wave intensity values between a plurality of communication devices provided in a vehicle and the mobile terminal by communicating the communication devices with the mobile terminal; a communication availability determination step of determining that a corresponding communication device is communicable when the distance value is equal to or less than a first predetermined value and the intensity value is equal to or more than a second predetermined value; and an estimation step of narrowing down a search range of the mobile terminal based on a distance value from the communication device having the smallest distance value of at least three of communication devices determined to be communicable in the communication availability determination step, and estimating the position of the mobile terminal.

A communication device mounted at a vehicle, the communication device including: a blocking section that, in a case in which communication with a second mobile device that is different from a first mobile device that transmits key information for the vehicle is interrupted, performs a blocking process to block an unlocking of the vehicle or a starting of the vehicle that is performed based on received key information.