Quantum Cryptography BB84 simulation
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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 Alice:
channel: Channel
sent: typing.List[bool] = field(default_factory=list)
my_basises: typing.List[bool] = field(default_factory=list)
key: typing.List[bool] = field(default_factory=list)
def generate_key_and_send(self, n: int = 100):
self.sent = [bool(r.randint(0, 1)) for _ in range(n)]
self.my_basises = [bool(r.randint(0, 1)) for _ in range(n)]
for key, basis in zip(self.sent, self.my_basises):
self.channel.send_bit(key, basis)
def generate_key(self, n: int = 100):
self.generate_key_and_send(n)
bobs_basises, bobs_correctness = bin_decode(self.channel.recv_classical(n, is_bob=False)), bin_decode(
self.channel.recv_classical(n, is_bob=False))
acceptance = [
my_basis == bobs_basis and bobs_correctness
for my_basis, bobs_basis, bobs_correctness in
zip(self.my_basises, bobs_basises, bobs_correctness)]
self.channel.send_classical(bin_encode(acceptance), is_bob=False)
self.key = [k for k, c in zip(self.sent, acceptance) if c]