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Sefik Ilkin Serengil 2025-03-09 14:33:04 +00:00 committed by GitHub
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@ -393,9 +393,6 @@ alpha = DeepFace.represent("img1.jpg")[0]["embedding"] # user tower
# encrypt source embedding
encrypted_alpha = cs.encrypt(alpha)
# remove cryptosystem and plain alpha not to be leaked in cloud
del cs, alpha
# restore the cryptosystem in cloud with only public key
cloud_cs = LightPHE(algorithm_name = "Paillier", precision = 19, key_file = "public.txt")
@ -409,14 +406,10 @@ encrypted_cosine_similarity = encrypted_alpha @ beta
with pytest.raises(ValueError, match="must have private key"):
cloud_cs.decrypt(encrypted_cosine_similarity)
# restore the cryptosystem on-prem with secret key
cs = LightPHE(algorithm_name = "Paillier", precision = 19, key_file = "secret.txt")
# decrypt similarity
calculated_similarity = cs.decrypt(encrypted_cosine_similarity)[0]
# verification
threshold = 0.68 # cosine distance threshold for VGG-Face and cosine
print("same person" if calculated_similarity >= 1 - threshold else "different persons")
```