Quantum Oblivious Transfer Over Noisy Channels With Error Correction

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Solution Overview

Problem

Existing quantum communication protocols face challenges in constructing oblivious transfer over noisy quantum channels, which are essential for secure multiparty computations, due to the impossibility of constructing oblivious transfer from other cryptographic primitives classically, and the need for noise-tolerant solutions in quantum communication.

Innovation Solution

A method for conducting composable quantum oblivious transfer over noisy quantum channels using a quantum-hard one-way function, involving bit commitment schemes, error correction, and hash functions to ensure security and reliability despite noise, allowing for the construction of QOT protocols that achieve simulator security and can be used in secure multiparty computations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If quantum oblivious transfer protocols are implemented over noisy quantum channels, then the protocols can be applied in practical secure multiparty computations, but the noise in the quantum channel causes errors in quantum bit transmission that compromise security and reliability

Engineering Contradiction:

Improveapplicability in secure multiparty computationsVSAvoidsecurity and reliability of quantum communication

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The protocol performs preliminary error estimation by comparing a first portion of received quantum bits with corresponding classical bits before the main oblivious transfer operation. This preliminary check allows the system to detect and correct channel noise effects in advance, ensuring reliability before the actual cryptographic operation occurs

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary error correction mechanism that acts as a mediator between the noisy quantum channel and the oblivious transfer protocol. This intermediary layer estimates errors and applies corrections, allowing the protocol to tolerate channel noise while maintaining security guarantees

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If error correction techniques are applied to tolerate noise in quantum channels, then the reliability of quantum communication is improved, but the complexity of the protocol increases

Engineering Contradiction:

Improveintegrity of quantum communicationVSAvoidprotocol complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The protocol applies error correction selectively to only a first portion of the quantum bits rather than all bits. This partial action approach provides sufficient error tolerance to guarantee security while avoiding the excessive complexity that would result from correcting every single bit

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The quantum bit string is segmented into different portions: a first portion used for error estimation and correction, and a second portion used for the actual oblivious transfer. This segmentation allows the complex error correction operations to be isolated to a subset of bits, reducing overall protocol complexity

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12621137B2Systems and methods for conducting composable quantum oblivious transfer over noisy quantum channels

Publication Date: 2026.05.05 JPMORGAN CHASE BANK NA

AI summary

Systems and methods for conducting composable quantum oblivious transfer over noisy quantum channels are disclosed. Embodiments provide a method for constructing a quantum oblivious transfer (QOT) protocol using noisy quantum channels and devices through the use of a quantum-hard one-way function. This construction allows the construction of QOT protocols that achieve simulator security, allowing them to be used in a black-box fashion as part of other cryptographic constructions, including arbitrary secure multiparty computations.