情报来源：
https://9to5mac.com/2020/04/02/2020-ipad-pro-privacy-hardware/
2020 iPad Pro first model with microphone hardware disconnect privacy feature
2020 iPad Pro是第一个加入麦克风断线隐私功能的iPad
Recent Apple MacBooks have included an aggressive security feature that
disconnects hardware microphones when the lid is physically closed. The
feature is designed to prevent eavesdropping on compromised hardware.
最近苹果Macbook加入了一个安全功能，当你盖上笔电后，笔电的麦克风会
自动断线。这个功能是拿来防窃听
Starting with the recently introduced 2020 iPad Pro, Apple is bringing the
same privacy feature to iPads.
这个功能也随着2020 iPad Pro来到了iPad
Apple started using this security measure in 2018 with MacBook models
equipped with Apple’s T2 security chip. The new security feature, which
works by closing the iPad with a case, requires using an MFi compliant
accessory with the 2020 model iPad Pro.
苹果开始在2018佩备有T2芯片（以A10X为基础）的Macbook上加上这个功能。
而在iPad上的类似功能，则是需要用MFI苹果认证的保护壳来盖上iPad
The latest version of Apple’s Platform Security document reveals the new
feature:
苹果官方文件的说明：
iPad models beginning in 2020 also feature the hardware microphone
disconnect. When an MFI compliant case (including those sold by Apple) is
attached to the iPad and closed, the microphone is disconnected in hardware,
preventing microphone audio data being made available to any software—even
with root or kernel privileges in iPadOS or in case the firmware is
compromised.
从2020开始卖的iPad (暗示今年还有其它的新iPad？）会有硬件麦克风断线功能。
当MFI认证的壳装到iPad上并且关闭，麦克风会从硬件上强制断线。这阻止了
麦克风的音讯被传到任何的软件上，就算iPadOS被越狱了或是被破解了
Apple’s document also highlights six other new security measures in place:
另外还有六项额外的安全措施
一、Data Vaults added to How Apple protects users’ personal information.
二、Updates to Using Bootstrap Token, User setup, Organization setup, and
Command-line tools.
三、Malware Removal Tool additions in Protecting against malware.
四、Updates to Shared iPad overview, Sign in to Shared iPad, and Sign out of
Shared iPad.
五、New Apple security and privacy certifications overview topic.
六、Updates to Apple security and privacy certifications overview and Apple
security assurance
心得：
感觉增加了很多有趣的隐私功能
硬件断线不知道原理是什么可以只让MFI认证的用
因为感觉这个不是靠软件或是iPad的电源来解的
如果是靠硬件token或是key感觉还是很好复制这个功能？