账号安全监测怎么搭建

import time

class UserActivityMonitor:
    def __init__(self):
        self.user_activity = {}

    def log_activity(self, user_id, activity_type):
        current_time = time.time()
        if user_id not in self.user_activity:
            self.user_activity[user_id] = []
        self.user_activity[user_id].append((activity_type, current_time))

    def check_anomalies(self, user_id):
        activities = self.user_activity.get(user_id, [])
        if len(activities) < 2:
            return False
        last_activity, second_last_activity = activities[-1], activities[-2]
        time_diff = last_activity[1] - second_last_activity[1]
        if time_diff < 60 and last_activity[0] == 'login' and second_last_activity[0] == 'login':
            return True
        return False

monitor = UserActivityMonitor()
monitor.log_activity('user123', 'login')
time.sleep(30)
monitor.log_activity('user123', 'login')
if monitor.check_anomalies('user123'):
    print("Potential brute force attack detected!")