def shuffleQuestion(question):
orig = CiphertextCollection(pk)
for ballot in ballots[question]:
ciphertext = Ciphertext(nbits, orig._pk_fingerprint)
for choice in ballot["choices"]:
ciphertext.append(long(choice["alpha"]), long(choice["beta"]))
orig.add_ciphertext(ciphertext)
print("Shuffling answers for question " + str(question))
shuf, proof = orig.shuffle_with_proof()
shufs_list.append(shuf.to_dict())
proofs_list.append(proof.to_dict())
print("Shuffle complete for question " + str(question))
def shuffleQuestion(question):
orig = CiphertextCollection(pk)
for ballot in ballots[question]:
ciphertext = Ciphertext(nbits, orig._pk_fingerprint)
for choice in ballot["choices"]:
ciphertext.append(long(choice["alpha"]), long(choice["beta"]))
orig.add_ciphertext(ciphertext)
print("Shuffling answers for question " + str(question))
shuf, proof = orig.shuffle_with_proof()
shufs_list.append(shuf.to_dict())
proofs_list.append(proof.to_dict())
print("Shuffle complete for question " + str(question))
trusteeThreshold = int(election['trustee_threshold'])
# Verify mixes
for i in xrange(0, numMixnets):
index = numMixnets - i - 1
for q in xrange(0, numQuestions):
with statusCheck("Verifying mix " + str(index) + " question " + str(q)):
proof = ShufflingProof.from_dict(mixnets[index][1][q], pk, nbits)
orig = CiphertextCollection(pk)
if i == 0:
for ballot in ballots:
ciphertext = Ciphertext(nbits, orig._pk_fingerprint)
for block in ballot["vote"]["answers"][q]["choices"]:
ciphertext.append(long(block["alpha"]), long(block["beta"]))
orig.add_ciphertext(ciphertext)
else:
for ballot in mixnets[index + 1][0][q]["answers"]:
ciphertext = Ciphertext(nbits, orig._pk_fingerprint)
for block in ballot["choices"]:
ciphertext.append(long(block["alpha"]), long(block["beta"]))
orig.add_ciphertext(ciphertext)
shuf = CiphertextCollection(pk)
for ballot in mixnets[index][0][q]["answers"]:
ciphertext = Ciphertext(nbits, shuf._pk_fingerprint)
for block in ballot["choices"]:
ciphertext.append(long(block["alpha"]), long(block["beta"]))
shuf.add_ciphertext(ciphertext)
# Check the challenge ourselves to provide a more informative error message
with statusCheck("Verifying mixes") as sc0:
for i in xrange(0, numMixnets):
index = numMixnets - i - 1
with statusCheck("Verifying mix " + str(index), sc0) as sc:
for q in xrange(0, numQuestions):
with statusCheck("Verifying mix " + str(index) + " question " + str(q), sc) as sc2:
proof = ShufflingProof.from_dict(mixnets[index][1][q], pk, nbits)
orig = CiphertextCollection(pk)
if i == 0:
for ballot in ballots:
ciphertext = Ciphertext(nbits, orig._pk_fingerprint)
for block in ballot["vote"]["answers"][q]["choices"]:
ciphertext.append(long(block["alpha"]), long(block["beta"]))
orig.add_ciphertext(ciphertext)
else:
for ballot in mixnets[index + 1][0][q]["answers"]:
ciphertext = Ciphertext(nbits, orig._pk_fingerprint)
for block in ballot["choices"]:
ciphertext.append(long(block["alpha"]), long(block["beta"]))
orig.add_ciphertext(ciphertext)
shuf = CiphertextCollection(pk)
for ballot in mixnets[index][0][q]["answers"]:
ciphertext = Ciphertext(nbits, shuf._pk_fingerprint)
for block in ballot["choices"]:
ciphertext.append(long(block["alpha"]), long(block["beta"]))
shuf.add_ciphertext(ciphertext)
# Check the challenge ourselves to provide a more informative error message