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Gottesman and Chuang Quantum Digital Signature: Difference between revisions
Gottesman and Chuang Quantum Digital Signature (edit)
Revision as of 16:58, 3 June 2019
, 3 June 2019→Pseudocode
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<u>'''Stage 1'''</u> Distribution | <u>'''Stage 1'''</u> Distribution | ||
*'''Input''' L | *'''Input''' L | ||
*'''Output''' Seller: <math>\{k_0^i, k_1^i\}</math>, <math>1\le i\le M</math>, <math>\{ | *'''Output''' Seller: <math>\{k_0^i, k_1^i\}</math>, <math>1\le i\le M</math>, <math>|\{f(k_0^i)\rangle, |f(k_1^i)\rangle\}</math> | ||
**'''Key Generation''' | **'''Key Generation''' | ||
#For m = 0,1 | #For m = 0,1 | ||
##For i=0,M | ##For i=0,M | ||
###Seller generates <math>k_m^i</math> | ###Seller generates classical bits <math>k_m^i</math> | ||
###Seller performs <math>k_m^i\rightarrow | ###Seller performs quantum one way map: <math>k_m^i\rightarrow |f(k_m^i)\rangle</math> | ||
**'''Key Distribution:''' (No Trusted Third Party Assumption) | **'''Key Distribution:''' (No Trusted Third Party Assumption) | ||
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###For j=1,2 | ###For j=1,2 | ||
####Seller sends <math>f_{k_m^i}^j</math> to buyer and verifier | ####Seller sends <math>f_{k_m^i}^j</math> to buyer and verifier | ||
####Buyer performs ''' | ####Buyer performs '''QSWAP TEST'''<math>(f_{k_m^i}^1, f_{k_m^i}^2)</math> | ||
####If | ####If QSWAP TEST= '''False''', Buyer '''aborts''' | ||
####If | ####If QSWAP TEST= '''True''', Buyer sends <math>f_{k_m^i}^{b}=f_{k_m^i}^2=f_{k_m^i}^1</math> to verifier | ||
####Verifier performs similar steps and sends <math>f_{k_m^i}^{v}=f_{k_m^i}^2=f_{k_m^i}^1</math> to buyer | ####Verifier performs similar steps and sends <math>f_{k_m^i}^{v}=f_{k_m^i}^2=f_{k_m^i}^1</math> to buyer | ||
####Both perform '''SWAP TEST'''<math>(f_{k_m^i}^{b},f_{k_m^i}^{v})</math> | ####Both perform '''SWAP TEST'''<math>(f_{k_m^i}^{b},f_{k_m^i}^{v})</math> | ||
####If | ####If QSWAP TEST= '''False''', protocol aborted | ||
####If | ####If QSWAP TEST= '''True''', distribution successful | ||
<u>'''Stage 2'''</u> Messaging | <u>'''Stage 2'''</u> Messaging | ||
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# For l = 1,2,..,L | # For l = 1,2,..,L | ||
## Buyer performs <math>k_b^i\rightarrow f_{new}</math> | ## Buyer performs <math>k_b^i\rightarrow f_{new}</math> | ||
## Buyer performs ''' | ## Buyer performs '''QSWAP TEST'''<math>(f_{new},f_{k_b^i})</math> | ||
## If | ## If QSWAP TEST= False, <math>s_B=s_B+1</math> | ||
#If <math>s_B<c_1M</math>, result '''1-ACC''' | #If <math>s_B<c_1M</math>, result '''1-ACC''' | ||
#If <math>c_1M<s_B<c_2M</math>, result '''0-ACC''' | #If <math>c_1M<s_B<c_2M</math>, result '''0-ACC''' | ||