Quantum Digital Signature: Difference between revisions

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==Functionality==
==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]]
'''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]]
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