mirror of
https://github.com/billbuchanan/appliedcrypto.git
synced 2026-02-22 03:37:57 +00:00
42 lines
952 B
Python
42 lines
952 B
Python
# Zero-knowledge Proof: Proving age with hash chains.
|
|
# https://asecuritysite.com/encryption/age
|
|
|
|
import hashlib;
|
|
import passlib.hash;
|
|
import sys;
|
|
|
|
age_actual=19
|
|
age_to_prove=18
|
|
seed=b"12345667"
|
|
|
|
proof = hashlib.md5(seed)
|
|
encrypted_age = hashlib.md5(seed)
|
|
|
|
for i in range(1,1+age_actual-age_to_prove):
|
|
proof = hashlib.md5(proof.digest())
|
|
|
|
for i in range(1,age_actual+1):
|
|
encrypted_age = hashlib.md5(encrypted_age.digest())
|
|
|
|
verfied_age=proof
|
|
|
|
for i in range(0,age_to_prove):
|
|
verfied_age = hashlib.md5(verfied_age.digest())
|
|
|
|
|
|
|
|
print "Peggy's Age:\t\t",age_actual
|
|
print "Age to prove:\t\t",age_to_prove
|
|
|
|
print "...."
|
|
|
|
|
|
print "Proof:\t\t",proof.hexdigest()
|
|
print "Encr Age:\t",encrypted_age.hexdigest()
|
|
print "Verified Age:\t",verfied_age.hexdigest()
|
|
|
|
if (encrypted_age.hexdigest()==verfied_age.hexdigest()):
|
|
print "You have proven your age ... please come in"
|
|
else:
|
|
print "You have not proven you age!"
|
|
|