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Measurement Device Independent Quantum Digital Signature (MDI-QDS) (edit)
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The [https://arxiv.org/pdf/1704.07178.pdf example protocol] achieves the functionality of [[Quantum Digital Signature]] (QDS) by allowing exchange of messages using the procedure studied in [[Prepare and Measure Quantum Digital Signature]] but without trusting one's measurement devices, thus making the protocol device independent. It uses the security proof of [[ | The [https://arxiv.org/pdf/1704.07178.pdf example protocol] achieves the functionality of [[Quantum Digital Signature]] (QDS) by allowing exchange of messages using the procedure studied in [[Prepare and Measure Quantum Digital Signature]] but without trusting one's measurement devices, thus making the protocol device independent. It uses the security proof of [[MDI-QKD]] to the QDS scheme for insecure channels [[Measurement Device Independent Quantum Digital Signature (MDI-QDS)#References|(1)]]. This scheme involves three parties and is designed for signing one bit and the authors suggest that longer messages can be signed by iterating the same process. All three [[Quantum Digital Signature#Properties|properties]] that define QDS i.e. non-repudiation, transferability and unforgeability are implied by the protocol.</br></br> | ||
'''Tags:''' [[:Category: Multi Party Protocols|Multi Party (three)]], [[:Category: Quantum Enhanced Classical Functionality|Quantum Enhanced Classical Functionality]], [[:Category: Specific Task|Specific Task]], [[Quantum Digital Signature]] (QDS), [[Prepare and Send Quantum Digital Signature|Prepare and Measure QDS]], QKD | '''Tags:''' [[:Category: Multi Party Protocols|Multi Party (three)]], [[:Category: Quantum Enhanced Classical Functionality|Quantum Enhanced Classical Functionality]], [[:Category: Specific Task|Specific Task]], [[Quantum Digital Signature]] (QDS), [[Prepare and Send Quantum Digital Signature|Prepare and Measure QDS]], QKD | ||
[[Category: Multi Party]][[Category: Quantum Enhanced Classical Functionality]][[Category: Specific Task]] | [[Category: Multi Party]][[Category: Quantum Enhanced Classical Functionality]][[Category: Specific Task]] | ||
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==Assumptions== | ==Assumptions== | ||
* There exists authenticated classical channels between Sender and Receiver and Sender and Verifier. | * There exists authenticated classical channels between Sender and Receiver and Sender and Verifier. | ||
* Receiver and Verifier share a [[ | * Receiver and Verifier share a [[MDI-QKD]] link, used to transmit classical messages in full secrecy | ||
==Outline== | ==Outline== | ||
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**''Measurement'' | **''Measurement'' | ||
**''Sifting'' | **''Sifting'' | ||
*'''Symmetrisation:''' Buyer and Verifier exchange half of their randomly chosen eliminated signature elements. This prevents a dishonest seller succeed in cheating by sending dissimilar public keys to the receiver and makes the protocol secure against repudiation. Thus ends the distribution phase. | *'''Symmetrisation:''' Buyer and Verifier exchange half of their randomly chosen eliminated signature elements. This prevents a dishonest seller succeed in cheating by sending dissimilar public keys to the receiver and makes the protocol secure against repudiation. Thus ends the distribution phase. | ||
Similarly, Messaging Phase is divided into the following steps: | Similarly, Messaging Phase is divided into the following steps: | ||