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Quantum Cheque: Difference between revisions
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* '''Gen''' | * '''Gen''' | ||
** In this method the cheque book and a key is created for the account holder by the bank. | ** In this method the cheque book and a key is created for the account holder by the bank. | ||
** The bank and the account holder create a shared key using [[Quantum Key Distribution]]. Both parties agree upon the [[Quantum Digital Signature]]. The account holder stores their private key safely with himself and shares the | ** The bank and the account holder create a shared key using [[Quantum Key Distribution]]. Both parties agree upon the [[Quantum Digital Signature]]. The account holder stores their private key safely with himself and shares the public key with the bank. | ||
** The bank then prepares <math>n</math> GHZ triplet states (link to page) and stores only the third entangled qubit of every GHZ in the database, while handing over the first two qubits of every GHZ state to the account holder. Along with this, the bank also creates and shares a corresponding unique serial number for this cheque. | ** The bank then prepares <math>n</math> GHZ triplet states (link to page) and stores only the third entangled qubit of every GHZ in the database, while handing over the first two qubits of every GHZ state to the account holder. Along with this, the bank also creates and shares a corresponding unique serial number for this cheque. | ||
** Finally, the account holder has stored their identity, shared key, private key, public key, serial number and first two entangled qubits of every GHZ triplet state whereas the bank has stored account holder's identity, shared key, public key, serial number and third entangled qubit of every GHZ triplet states in their respective databases.<br></br> | ** Finally, the account holder has stored their identity, shared key, private key, public key, serial number and first two entangled qubits of every GHZ triplet state whereas the bank has stored account holder's identity, shared key, public key, serial number and third entangled qubit of every GHZ triplet states in their respective databases.<br></br> | ||