Quantum communication message transmission with hearing detection
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Solution Overview
Problem
Existing quantum communication systems using entangled photons are limited in the number and type of information they can transmit and are vulnerable to eavesdropping, particularly with the advent of quantum computing, which can compromise the security of hash functions used for verifying the identity of the data sender.
Innovation Solution
A method and system for transmitting a message using entangled photons that involves converting the message into a predetermined polarization state, measuring the average polarization state of duplicated photons, and implementing a shared quantum key generation method to detect eavesdropping by comparing lists of reception times and polarization states between receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If quantum communication systems use entangled photons to transmit information, then the transmission speed and efficiency are improved, but the system becomes vulnerable to eavesdropping and quantum computing attacks
Solution Approach 1:
The patent applies preliminary action by pre-establishing multiple authentication values and hash functions before the quantum communication occurs. The system prepares multiple possible authentication paths in advance, so when eavesdropping is detected through polarization measurement discrepancies, the legitimate parties can immediately switch to alternative authentication values without interrupting the communication flow. This preemptive preparation ensures both high transmission speed and security.
Solution Approach 2:
The patent changes parameters by using multiple different hash functions (MD5, SHA1, SHA256, RIPEMD) and multiple authentication values instead of relying on a single authentication mechanism. The system dynamically selects and switches between different hash functions and authentication values based on the detected eavesdropping conditions, transforming the security approach from static to dynamic parameter adjustment.
2Reliability
If the system uses multiple authentication values and hash functions to prevent eavesdropping, then security is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a single quantum communication system that can perform multiple authentication functions using different hash functions (MD5, SHA1, SHA256, RIPEMD) and multiple authentication values. The same entangled photon system handles both information transmission and multiple layers of authentication, eliminating the need for separate authentication devices and reducing overall system complexity despite the multi-functional capability.
Solution Approach 2:
The patent uses polarization state as an intermediary to detect eavesdropping without directly interfering with the information transmission channel. By measuring polarization discrepancies of entangled photons, the system indirectly detects the presence of eavesdroppers, allowing authentication verification to occur through a mediator (polarization measurement) rather than requiring complex direct interaction between authentication mechanisms and transmission data.
3Length of stationary object
If the second receiver is placed further from the emitter to enable quantum key distribution, then the communication distance is improved, but the photon loss and detection difficulty increase
Solution Approach 1:
The patent replaces traditional mechanical or electronic signal transmission with quantum mechanical entangled photon transmission. By utilizing the quantum entanglement phenomenon where measurement of one photon instantly determines the state of its entangled partner regardless of distance, the system achieves long-distance communication without the signal degradation that plagues classical systems. The polarization state measurement substitutes for traditional signal detection methods.
Solution Approach 2:
The patent implements feedback by using the polarization measurement results of entangled photons to continuously monitor and verify the integrity of the communication channel. The system measures polarization states at both receivers, compares the results, and uses this feedback to detect eavesdropping attempts. This feedback mechanism allows the system to maintain detection accuracy over long distances by continuously verifying quantum state correlations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the security of quantum communication by preventing and detecting eavesdropping, allowing for secure and efficient transmission of information using entangled photons without latency, even over long distances.
Implementation Method 1
generate a series of N p pairs of entangled photons from an emitter, the first photon of each pair being emitted towards the first receiver on a first propagation path and the second photon of the pair being emitted simultaneously towards the second receiver on a second propagation path, the first and second photons being entangled
Implementation Method 2
for each information I: (a) for each entangled photon, modify the polarization state of the first photon when it reaches the first receiver to a polarization state dependent on the information I to be transmitted
Implementation Method 3
using an absorption instrument, absorb the first photon in one of the two complementary polarizations of the selected pair
Implementation Method 4
duplicate each received photon into a stream of multiplied photons by means of an amplification device, the light that is created having preserved the polarization state of the photon
Implementation Method 5
measure, for each duplicated photon, the average polarization state of the light stream
Data Source
Figure 1A~1B
Figure 2A~3
Figure 4A~4B
AI summary
Quantum communication system (1) comprising: • an entangled photon emitter (2), comprising a source configured to generate at least one pair of entangled photons comprising a first photon (P1) emitted on a first propagation path (D1), and simultaneously a second photon (P2) emitted on a second propagation path (D2) different from the first propagation path; • a first receiver (3) disposed on the first propagation path (D1), comprising a complex absorber (31) configured to absorb the photon in a polarization state selected from the states of at least two different pairs of complementary polarization states; • a second receiver (4) disposed on the second propagation path (D2), comprising an optical amplifier (40) for multiplying the second photon (P2) while preserving its polarization and a measuring instrument (45) for measuring the average polarization of the multiplied photons (P20).