Editing Quantum Cheque (section)

== Assumptions ==
* The protocol assumes the account holder and the bank, to be honest. The bank is a trusted party, however, the branches may or may not be trusted.
* This protocol assumes perfect state preparations, transmissions, and measurements.
* The protocol takes the assumption that the Digital Signature and the Quantum key distribution schemes are unconditionally secure.
* The digital signature scheme is a black box where any unconditionally secure digital signature scheme can be used which must satisfy the following security conditions of unforgeability and non-repudiation. [[Quantum Digital Signature]] is one of the examples of a digital signature scheme which can be used.