账号安全监测年末促销

import time

class AccountMonitor:
    def __init__(self, user_id):
        self.user_id = user_id
        self.login_history = []

    def log_login(self, ip_address, device):
        timestamp = time.time()
        self.login_history.append({
            'timestamp': timestamp,
            'ip_address': ip_address,
            'device': device
        })
        self.check_for_anomalies()

    def check_for_anomalies(self):
        if len(self.login_history) > 5:
            recent_logins = self.login_history[-5:]
            if not self.is_normal_activity(recent_logins):
                print(f"ALERT: Abnormal activity detected for user {self.user_id}")

    def is_normal_activity(self, logins):
        # 简单的异常检测逻辑
        ip_addresses = [login['ip_address'] for login in logins]
        devices = [login['device'] for login in logins]
        if len(set(ip_addresses)) > 2 or len(set(devices)) > 2:
            return False
        return True

# 示例使用
monitor = AccountMonitor(user_id=123)
monitor.log_login(ip_address="192.168.1.1", device="Laptop")
monitor.log_login(ip_address="192.168.1.2", device="Mobile")
monitor.log_login(ip_address="192.168.1.1", device="Laptop")
monitor.log_login(ip_address="192.168.1.3", device="Tablet")
monitor.log_login(ip_address="192.168.1.4", device="Desktop")