1
 secrets
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curve = registry.get_curve('brainpoolP256r1')
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def compress_point(point):
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    return hex(point.x) + hex(point.y % 2)[2:]
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def ecc_calc_encryption_keys(pubKey):
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    ciphertextPrivKey = secrets.randbelow(curve.field.n)
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    ciphertextPubKey = ciphertextPrivKey * curve.g
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    sharedECCKey = pubKey * ciphertextPrivKey
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    return (sharedECCKey, ciphertextPubKey)
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def ecc_calc_decryption_key(privKey, ciphertextPubKey):
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    sharedECCKey = ciphertextPubKey * privKey
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    return sharedECCKey
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privKey = secrets.randbelow(curve.field.n)
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pubKey = privKey * curve.g
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print("private key:", hex(privKey))
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print("public key:", compress_point(pubKey))
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(encryptKey, ciphertextPubKey) = ecc_calc_encryption_keys(pubKey)
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print("ciphertext pubKey:", compress_point(ciphertextPubKey))
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print("encryption key:", compress_point(encryptKey))
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decryptKey = ecc_calc_decryption_key(privKey, ciphertextPubKey)
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print("decryption key:", compress_point(decryptKey))
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Run the above code example: