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US 8,077,047 B2Granted
Tampering detection system using quantum-mechanical systems
AssigneeUT-Battelle, LLC
InventorsTravis S. Humble, Ryan S. Bennink, Warren P. Grice
Life of this patent
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Abstract
The use of quantum-mechanically entangled photons for monitoring the integrity of a physical border or a communication link is described. The no-cloning principle of quantum information science is used as protection against an intruder's ability to spoof a sensor receiver using a ‘classical’ intercept-resend attack. Correlated measurement outcomes from polarization-entangled photons are used to protect against quantum intercept-resend attacks, i.e., attacks using quantum teleportation.
Claims21
A system for monitoring the integrity of a boundary comprising:
- a source apparatus for generating a first and a second quantum system, the first and the second quantum systems being quantum mechanically entangled in at least one monitored physical property;
- a transmission medium disposed adjacent the boundary;
- a first receiver and a second receiver;
- a transmission apparatus for directing the first quantum system through the transmission medium to the first receiver and for directing the second quantum system to the second receiver;
- an evaluation apparatus for assessing a first verifying quantum system received by the first receiver and for assessing a second verifying quantum system received by the second receiver and for estimating whether the first verifying quantum system and the second verifying quantum system are quantum mechanically entangled in the at least one monitored physical property;
- and
- an alarm apparatus for indicating a possible compromise of the boundary if the first verifying quantum system and the second verifying quantum system are not likely quantum mechanically entangled in the at least one monitored physical property.
4 more elements
A system for monitoring the integrity of a communication link comprising:
- a source apparatus for generating a first and a second quantum system, the first and the second quantum systems being quantum mechanically entangled in at least one monitored physical property, with each monitored physical property having a value pair corresponding to the first and the second quantum system;
- a first receiver and a second receiver;
- a transmission apparatus for directing the first quantum system through the communication link to the first receiver and for directing the second quantum system to the second receiver;
- a first evaluation apparatus for estimating a first value of each monitored physical property of a first verifying quantum system received by the first receiver;
- a second evaluation apparatus for estimating a second value of each monitored physical property of a second verifying quantum system received by the second receiver;
- and
- an alarm system for indicating a possible compromise of the communication link if the estimated first value of each monitored physical property of the first verifying quantum system and the estimated second value of each monitored physical property of the second verifying quantum system are not likely equal to the paired values of each monitored physical property.
4 more elements
A system for monitoring the integrity of a transmission of a quantum system comprising:
- an apparatus for generating the quantum system with an as-transmitted value of a monitored physical property;
- a transmission medium;
- a receiver;
- a transmission apparatus for directing the quantum system through the transmission medium to the receiver;
- an evaluation system for estimating an as-received value of the monitored physical property of a verifying quantum system received by the receiver;
- and
- an alarm system for comparing the as-transmitted value of the monitored physical property of the transmitted quantum system with the as-received value of the monitored physical property of the verifying quantum system and for indicating a possible compromise of the transmission of the quantum system if the estimated as-received value of the monitored physical property of the verifying quantum system does not likely correspond to the as-transmitted value of the monitored physical property of the transmitted quantum system.
4 more elements
A method for monitoring the integrity of a boundary comprising:
- generating a first and a second quantum system, the first and the second quantum systems being quantum mechanically entangled in at least one monitored physical property;
- transmitting the first quantum system through a transmission medium along the boundary to a first receiver and transmitting the second quantum system to a second receiver;
- estimating whether the first verifying quantum system received by the first receiver and the second verifying quantum system received by the second receiver are quantum mechanically entangled in the at least one monitored physical property;
- and
- generating an indication of possible compromise of the boundary if the first verifying quantum system and the second verifying quantum system are not likely quantum mechanically entangled in the at least one monitored physical property.
2 more elements
A method for monitoring the integrity of a communication link comprising:
- generating a first and a second quantum system, the first and the second quantum systems being quantum mechanically entangled in at least one monitored physical property, with each monitored physical property having a value pair corresponding to the first and the second quantum system;
- transmitting the first quantum system through the communication link to a first receiver and transmitting the second quantum system to a second receiver;
- estimating a first value of each monitored physical property of a first verifying quantum system received by the first receiver;
- estimating a second value of each monitored physical property of a second verifying quantum system received by the second receiver;
- comparing the estimated first value of each monitored physical property of the first verifying quantum system with the estimated second value of each monitored physical property of the second verifying quantum system;
- and
- generating an indication of a possible compromise of the communication link if the estimated first value of each monitored physical property of the first verifying quantum system and the estimated second value of each monitored physical property of the second verifying quantum system are not likely equal to the value pair of each monitored physical property.
4 more elements
A method for monitoring the integrity of a transmission of a quantum system comprising:
- generating the quantum system with an as-transmitted value of a monitored physical property;
- transmitting the quantum system through a transmission medium to a receiver;
- estimating an as-received value of the monitored physical property of a verifying quantum system received by the receiver;
- comparing the as-transmitted value of the monitored physical property of the transmitted quantum system with the estimated as-received value of the monitored physical property of the verifying quantum system;
- and
- indicating a possible compromise of the transmission of the quantum system if the estimated as-received value of the monitored physical property of the verifying quantum system does not likely correspond to the as-transmitted value of the monitored physical property of the transmitted quantum system.
3 more elements
Dependencies are inferred from the claim text.