Quantum_Cryptography/model/bob.py

from dataclasses import dataclass, field
from channel import Channel, ChannelSym
import random as r
import typing

from utils import bin_encode, bin_decode


@dataclass
class Bob:
    channel: Channel
    my_results: typing.List[typing.Tuple[bool, bool]] = field(default_factory=list)
    key: typing.List[bool] = field(default_factory=list)
    true_basises: typing.List[bool] = field(default_factory=list)
    my_basises: typing.List[bool] = field(default_factory=list)

    def recv_photons(self, n: int = 100):
        self.my_basises = [bool(r.randint(0, 1)) for _ in range(n)]
        self.my_results = self.channel.get_photon_results(self.my_basises)

    def send_basises_and_correctness(self):
        self.channel.send_classical(bin_encode(self.my_basises))
        self.channel.send_classical(bin_encode([left + right == 1 for left, right in self.my_results]))

    def generate_key(self, n: int = 100):
        self.recv_photons(n)
        self.send_basises_and_correctness()
        correctness = bin_decode(self.channel.recv_classical(n))
        self.key = [(False if k[0] else True) for k, c in zip(self.my_results, correctness) if c]