Quantum Digital Signature: Difference between revisions

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 ==Functionality==
-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 and the properties of transferability, non-repudiation and unforgeability (see [[Quantum Digital Signature#Properties|Properties]]). It ensures that once signed a classical message with a quantum digital signature (QDS) the sender (seller) cannot deny at a later stage having signed the message, a recipient (buyer) cannot fake or alter the QDS and another sender (verifier) can use the above two properties to verify if the sent message is signed by the genuine sender.
+Digital Signatures (QDS) allow the exchange of classical messages from sender to multiple recipients, with a guarantee that the signature has come from a genuine sender. Additionally, it comes with the properties of (i) [[Quantum Digital Signature#Properties|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) [[Quantum Digital Signature#Properties|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) [[Quantum Digital Signature#Properties|unforgeability]] i.e. a dishonest recipient cannot alter or fake the sender's DS and forward it to other recipients successfully. <br/>
 '''Tags:'''  [[:Category: Multi Party Protocols|Multi Party (three)]],  [[:Category: Quantum Enhanced Classical Functionality|Quantum Enhanced Classical Functionality]],  [[:Category: Specific Task|Specific Task]], [[Blind Quantum Digital Signature]], [[Arbitrated Signature]], [[Quantum Proxy Signature]], [[Designated Verifiable Quantum Signature]], [[Limited Delegation of Quantum Signature]]