Created
November 23, 2019 13:03
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import cirq | |
import random | |
class Bob: | |
def __init__(self): | |
self._result_bits = [] | |
self.decode_gates = [] | |
self._secret_key = '' | |
def measure_qubits(self, circuit, qubit): | |
# 0:X基底、1:H基底 | |
bit = random.choice([0, 1]) | |
self.decode_gates.append(bit) | |
if bit == 0: | |
circuit.append(cirq.X(qubit)) | |
else: | |
circuit.append(cirq.H(qubit)) | |
# qubitを測定する | |
circuit.append(cirq.measure(*[qubit], key='bob')) | |
result = cirq.Simulator().run(circuit) | |
self._result_bits.append(result.measurements['bob'][0][0]) | |
print(circuit) | |
def set_secret_key(self, encode_gates): | |
self._secret_key = '' | |
for index, gate in enumerate(self.decode_gates): | |
# エンコードしたゲートとデコードしたゲートが同じであれば、 | |
# 対応するresult_bitを秘密鍵のbitに追加 | |
if gate == encode_gates[index]: | |
self._secret_key += str(self._result_bits[index]) | |
print('bob_secret_key : ' + self._secret_key) |
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