Prepare and Measure Quantum Digital Signature: Difference between revisions

This [[https://arxiv.org/abs/1403.5551 example protocol]] achieves the task of [[Quantum Digital Signature]] which allows for the exchange of single or multiple bit classical messages from sender to multiple recipients such that parties are required to prepare and measure quantum states instantly without having to store them. For simplicity, most protocols take into account the case of one sender and two recipients (Seller, buyer, and verifier) exchanging single-bit classical messages.</br> It ensures that 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, thus, satisfying properties of  [[Quantum Digital Signature#Properties|transferability]], [[Quantum Digital Signature#Properties|non-repudiation]] and [[Quantum Digital Signature#Properties|unforgeability]]. It allows the user to sign electronic documents.</br>