EHF secure communication device
First Claim
1. A data communication device comprising:
- a communication interface unit comprising;
a transmitter unit configured to transmit data using close proximity extremely high frequency (EHF) electromagnetic energy to a computing device over a first transmission patha receiver unit configured to receive data from the computing device over a second transmission path; and
an interface control circuit coupled to the transmitter unit and the receiver unit, and configured to;
detect training information—
from an EHF transmission transmitted by the computing device,evaluate one or more attributes of the detected training and the detected capability information,determine whether to establish a communication link over the first and the second paths with the computing device based on the evaluation,calculating a round-trip propagation time of training information transmitted along a communication path beginning from the communication device, through the receiving device, and returning to the communication device,generating an encryption key based at least in part on the calculated round-trip propagation time of the training information, andencrypt information exchanged between the communication interface unit and the computing device using the encryption key.
5 Assignments
0 Petitions
Accused Products
Abstract
A communication device employs a contactless secure communication interface to transmit and receive data with a computing device using close proximity extremely high frequency (EHF) communication. The communication device and the computing device periodically initiate a discovery operation mode, whereby the devices periodically transmit identifying information about the respective devices and listen for identifying information from the other device. Upon completion of the discovery mode operation, the devices enter a link-training operation mode and exchange capability information about the respective devices. During transport mode operation the communication device employs methods to manage access to data stored on the communication device by encrypting the data using one or a combination of training information or capability information as a basis for generating an encryption key.
267 Citations
17 Claims
-
1. A data communication device comprising:
-
a communication interface unit comprising; a transmitter unit configured to transmit data using close proximity extremely high frequency (EHF) electromagnetic energy to a computing device over a first transmission path a receiver unit configured to receive data from the computing device over a second transmission path; and an interface control circuit coupled to the transmitter unit and the receiver unit, and configured to; detect training information—
from an EHF transmission transmitted by the computing device,evaluate one or more attributes of the detected training and the detected capability information, determine whether to establish a communication link over the first and the second paths with the computing device based on the evaluation, calculating a round-trip propagation time of training information transmitted along a communication path beginning from the communication device, through the receiving device, and returning to the communication device, generating an encryption key based at least in part on the calculated round-trip propagation time of the training information, and encrypt information exchanged between the communication interface unit and the computing device using the encryption key. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of regulating access to information located on a communication device, the method comprising:
-
generating, by an extremely high frequency (EHF) transmitting device included in the communication device, training information, the training information specifying a data pattern used by a receiving device to select receiving device settings to exchange information over a transmission path, the training information indicating a signal propagation time, the signal propagation time representing a measure of time that it takes for an EHF transmission transmitted by the transmitting device to the receiving device to be received by the transmitting device from the receiving device over the transmission path; receiving from the receiving device a training completion message indicating that the training information was received by the receiving device; and generating an encryption key using one or more attributes of the training information, the one or more attributes of the training information including at least the signal propagation time. - View Dependent Claims (11, 12, 13)
-
-
14. A method of regulating access to information located on a communication device, the method comprising:
-
receiving from an extremely high frequency (EHF) transmitting device training information, the training information specifying a data pattern used by a receiving device to select receiving device settings to exchange information with the transmitting device over a transmission path, the training information indicating a signal propagation time, the signal propagation time representing a measure of time that it takes for an EHF transmission transmitted by the receiving device to the transmitting device to be received by the receiving device from the transmitting device over the transmission path; sending by the receiving device a training completion message indicating that the training information was received by the receiving device; and generating an encryption key using one or more attributes of the training information, the one or more attributes of the training information including at least the signal propagation time. - View Dependent Claims (15, 16, 17)
-
Specification