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Merge pull request #83 from lackrobin/patch-3

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Update b_dhke.py
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phyro
2023-01-03 14:59:51 +01:00
committed by GitHub
parent e9b5f93698 6d0ac86608
commit 0f3cc010ac
1 changed files with 6 additions and 6 deletions
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cashu/core/b_dhke.py
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@@ -3,31 +3,31 @@
""" """
Implementation of https://gist.github.com/RubenSomsen/be7a4760dd4596d06963d67baf140406 Implementation of https://gist.github.com/RubenSomsen/be7a4760dd4596d06963d67baf140406
Alice (Client): Bob (Mint):
A = a*G A = a*G
return A return A
Bob (Mint): Alice (Client):
Y = hash_to_curve(secret_message) Y = hash_to_curve(secret_message)
r = random blinding factor r = random blinding factor
B'= Y + r*G B'= Y + r*G
return B' return B'
Alice: Bob:
C' = a*B' C' = a*B'
(= a*Y + a*r*G) (= a*Y + a*r*G)
return C' return C'
Bob: Alice:
C = C' - r*A C = C' - r*A
(= C' - a*r*G) (= C' - a*r*G)
(= a*Y) (= a*Y)
return C, secret_message return C, secret_message
Alice: Bob:
Y = hash_to_curve(secret_message) Y = hash_to_curve(secret_message)
C == a*Y C == a*Y
If true, C must have originated from Alice If true, C must have originated from Bob
""" """
import hashlib import hashlib