Editing Gottesman and Chuang Quantum Digital Signature (section)

==Further Information==
This protocol was the first ever scheme designed for Quantum Digital Signatures. Due to unavailability of quantum memory at the current stage, this scheme has not seen enough experimental implementations, yet variations of the same without the need of quantum memory has some progress such as [[Prepare and Measure Quantum Digital Signature]], [[Measurement Device Independent Quantum Digital Signature (MDI-QDS)]], etc..
Following is the list of few more protocols with similar requirement (quantum memory) but small variations.
*'''Theoretical Papers'''
# [https://arxiv.org/abs/quant-ph/0105032 GC (2001)] above protocol
#[https://arxiv.org/abs/quant-ph/0601130 ACJ (2006)] discusses coherent states comparison with a QDS scheme outlined in the last section. 
##Protocol uses the same protocol as (2) but replaces qubits with [[coherent states]], thus replacing SWAP-Test with [[Coherent State Comparison]]. Additionally, it also requires quantum memory, authenticated quantum and classical channels, [[multiports]]. 
##Security: [[Information-theoretic]]
#[https://www.sciencedirect.com/science/article/pii/S0030402617308069 Shi et al (2017)] Discusses an attack and suggests corrections on existing QDS scheme using single qubit rotations. Protocol uses rotation, qubits, [[one-way hash function]]; Private keys: angle of rotation, Public keys: string of rotated quantum states. 
##'''Requires''' [[random number generator]], [[one-way hash function]], quantum memory, key distribution. 
##'''Security:''' [[Computational]]
*'''Experimental Papers'''
#[https://www.nature.com/articles/ncomms2172 Clarke et al (2012)] uses phase encoded coherent states, [[coherent state comparison]]
##Loss from multiport=7.5 dB, Length of the key= <math>10^6</math>