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

Measurement Device Independent Quantum Digital Signature (MDI-QDS) (edit)

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 Quantum Digital Signature protocols can be separated into two stages: the distribution stage, where quantum public keys are sent to all recipients, and the messaging stage, where classical messages are sent and verified. Here, we take the case of three parties, one sender (referred to as seller) and two receivers (buyer and verifier) sharing a one bit message.\newline
 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 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 Verfier, 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.
+*'''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.
 *'''MDI-KGP:''' MDI-KGP is based on MDI-QKD but consists of fewer steps (only quantum communication) and can be divided into the following steps:
 **''State Preparation:''