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Quantum Digital Signature: Difference between revisions
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Digital Signatures (DS) allow for the exchange of single or multiple bit classical messages from sender to multiple recipients, with a guarantee that the signature has come from a genuine sender. It comes with the properties of (i) transferability, i.e. messages with DS can be forwarded from one recipient to another such that DS is verifiable to have come from the original sender, (ii) non-repudiation, i.e at any stage after sending the message to one recipient, sender cannot deny having sent the message and corresponding DS, and (iii) unforgeability, i.e. a dishonest recipient cannot alter or fake the sender's DS and forward it to other recipients successfully. | Digital Signatures (DS) allow for the exchange of single or multiple bit classical messages from sender to multiple recipients, with a guarantee that the signature has come from a genuine sender. It comes with the properties of (i) transferability, i.e. messages with DS can be forwarded from one recipient to another such that DS is verifiable to have come from the original sender, (ii) non-repudiation, i.e at any stage after sending the message to one recipient, sender cannot deny having sent the message and corresponding DS, and (iii) unforgeability, i.e. a dishonest recipient cannot alter or fake the sender's DS and forward it to other recipients successfully. | ||
==Protocols== | ==Protocols== | ||
For simlicity, most protocols use the case of three parties, one sender (Seller) and two recipients (Buyer and Verifier). | For simlicity, most protocols use the case of three parties, one sender (Seller) and two recipients (Buyer and Verifier) exchanging one-bit classical messages signed by Quantum Digital Signatures (QDS). | ||
*[[Single bit messages]] | *[[Single bit messages]] | ||
*[[Multiple-bit messages]] | *[[Multiple-bit messages]] | ||
*[[Prepare and Measure Quantum Digital Signature]] | *[[Prepare and Measure Quantum Digital Signature]] | ||
*[[Measurement Device Independent Quantum Digital Signature]] | *[[Measurement Device Independent Quantum Digital Signature (MDI-QDS)]] | ||
*[[No quantum memory]] | *[[No quantum memory]] | ||
*[[No authenticated/secure channel]] | *[[No authenticated/secure channel]] | ||
*[[Blind Quantum Digital Signature]] | *[[Blind Quantum Digital Signature]] | ||
==Use Case== | ==Use Case== | ||