隐藏 SSID 不仅不会变安全，对你自己反而是有隐私风险的。因为你的设备要自动连接隐藏了 SSID 的 WiFi ， 就必须不停尝试连接那个 SSID 。不像普通 WiFi ，只会被动扫描，只有扫描到了才会尝试连接。这边有早年微软的文档解释这个事：

https://technet.microsoft.com/en-us/library/bb726942.aspx#EDAA

Therefore, using non-broadcast networks compromises the privacy of the wireless network configuration of a Windows XP or Windows Server 2003-based wireless client because it is periodically disclosing its set of preferred non-broadcast wireless networks. When non-broadcast networks are used to hide a vulnerable wireless network — such as one that uses open authentication and Wired Equivalent Privacy — a Windows XP or Windows Server 2003-based wireless client can inadvertently aid malicious users, who can detect the wireless network SSID from the wireless client that is attempting to connect. Software that can be downloaded for free from the Internet leverages these information disclosures and targets non-broadcast networks.

还有现在 iOS 连接隐藏 SSID 不是也会有警告说会泄露个人信息吗？