Measurement Device Independent Quantum Digital Signature (MDI-QDS): Difference between revisions

The following protocol consists of only quantum communication in the distribution phase and only classical communication in the messaging phase. It uses the protocol for QDS with insecure channels [[Measurement Device Independent Quantum Digital Signature (MDI-QDS)#References|(1)]] and replaces KGP (Key generation protocol) with Measurement Device Independent KGP (MDI-KGP). Distribution phase can be divided into the following steps:

*'''Key Distribution:''' Seller uses MDI-KGP twice with Buyer and Verifier, each, to generate four different [[correlated]] keys. Both Seller and Receiver have two keys each, one for message bit 0 and one for message bit 1. Sender's signature for a particular message bit is a conjugation of corresponding key for message bit sent to the Buyer and the Verifier.  

**''State Preparation''

**''Measurement''