US 12,587,542 B2 · Man-in-the-middle extender defense in data communications

Abstract

A method of determining whether a received message at a communications device is from a legitimate second device may include building a message intended for a legitimate second device, generating a time delay using a secret key known to the device and the legitimate second device, sending the built message to the legitimate second device, starting a timer at the time of sending the built message, receiving a response to the sent message, determining a response time of the received response based on a time value of the timer, determining an acceptable receive window of time based on the generated time delay, determining whether the determined response time is within the determined acceptable receive window of time, and when the determined response time is within the determined acceptable receive window of time, recognizing the received response as a legitimate message from the legitimate second device.

Claims20

Dependent claims

A computing device comprising:

a processor;
a transceiver communicably coupled with the processor, the transceiver configured to communicate over a network;
and
a memory communicably coupled with the processor, the memory storing instructions that, when executed by the processor, direct the computing device to perform operations including:
sending a request for a data point to one or more proximate devices;
receiving at least one requested data point from at least two of the one or more proximate devices;
determining whether the at least one requested data point includes predetermined acceptable values;
analyzing the at least one requested data point that include acceptable values to determine at least one reconciled data point;
storing the at least one reconciled data point;
and
sending the at least one reconciled data point to one or more other devices.

8 more elements

Dependencies are inferred from the claim text.

Man-in-the-middle extender defense in data communications

Life of this patent

Man-in-the-middle extender defense in data communications

Life of this patent

Abstract

Claims20