iOS11.1出來了，包含了前一陣子的WPA2漏洞修補，不升級是不行的。
而且耗電也有改善...

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About the security content of iOS 11.1

Wi-Fi
Available for: iPhone 7 and later, and iPad Pro 9.7-inch (early 2016) and later
Impact: An attacker in Wi-Fi range may force nonce reuse in WPA clients (Key Reinstallation Attacks - KRACK)
Description: A logic issue existed in the handling of state transitions. This was addressed with improved state management.
CVE-2017-13080: Mathy Vanhoef of the imec-DistriNet group at KU Leuven