Patent attributes
A method for controlling access to a resource, the method performed by a system comprising a first component, a second component and a third component, the first component comprising a first cryptographic key; the second component comprising a second cryptographic key. The method comprising: transmitting a signal; generating, by the first component a first channel observation; generating, by the second component, a second channel observation, and a first data value based on the second channel observation and the second cryptographic key; transmitting, by the second component, the second channel observation and the first data value; and verifying the second component based on the second channel observation, the first cryptographic key and the first data value; and allowing access to the resource in response to determining that the second component is: 1) permitted to gain access to the resource; and 2) located proximate to the first component.
