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Hard core anti eavesdropping! Mac exclusive function comes to iPad: the most strict protection mechanism in the industry, based on T2 chip

via:博客园     time:2020/4/5 9:31:10     readed:80

Apple has really spared no effort in protecting the privacy of its users.

That effort is also reflected in apple's latest release of the device. On a recently released MacBook Air 2020, the T2 security chip that Apple has developed

Now, this feature comes to the iPad Pro 2020.

硬核防窃听!Mac

Hardware blocking function of iPad Pro 2020

Recently, apple's official website updated the introduction of platform security (Apple Platform Security), which included a section on "hardware microphone blocking in Mac and iPad" on how IPad implement hardware microphone blocking.

Apple said:

IPad models from 2020 also feature hardware microphone disconnect. When MFI compatible covers (including those sold by Apple) are connected to the iPad and turned on, the microphone is disconnected at the hardware level, preventing the microphone audio data from being available to any software.

硬核防窃听!Mac

Attention, here is any software, including software with root or kernel privileges in the iPadOS.

This feature is now iPad Pro 2020 exclusive, given that the iPad models beyond 2020 include only just released iPad Pro 2020,.

That is, in the process of using the iPad Pro 2020, when the user closes the protective sleeve, the iPad Pro 2020 will disconnect the microphone from the hardware level so that no software can connect to the microphone

It should be noted that the protective cover mentioned here must come from Apple official or have the MFI certification authorized by apple.

硬核防窃听!Mac

So, what is MFI certification?

MFI, is a Made for iPhone /iPad /iPod, of apple's license to use the logo of external accessories produced by its authorized accessories manufacturer, which can prove that electronic accessories are dedicated to connecting iPhone、iPad or iPod, and are verified by developers to meet Apple performance standards.

What is worth mentioning is that apple has stressed that, although currently available only for iPad Pro 2020, the feature will appear in all iPad models from now on, not exclusively iPad Pro series.

For apple, this approach is naturally welcomed by the outside world. Lei Feng understands that John Gruber, a well-known Apple blogger, believes on his blog daring fireball that this fully demonstrates the performance of an enterprise (i.e. Apple) when focusing on security is the highest priority.

Will Apple's T2 chip be on the iPad?

It should be noted that the hardware blocking function for the microphone has been exclusive to the MAC product system before, and its implementation is based on Apple's T2 security chip.

T2 security chip, an arm architecture chip developed by apple, is specially designed for MAC; it first appeared in IMAC pro at the end of 2017. In Apple's official words, T2 is introduced as follows:

This apple T2 chip is the second generation of customized MAC chip introduced by apple. By redesigning and integrating several controllers in other MAC systems, such as system management controller, image signal processor, audio controller and solid-state drive controller, apple T2 chip brings many new functions to Mac.

硬核防窃听!Mac

In terms of specific functions, T2 image signal processor can cooperate with FaceTime HD camera to further improve tone mapping and exposure control, and can automatically expose and adjust white balance based on face recognition technology.

But T2 is more concerned about its safety function.

For example, its security partition coprocessor has laid a solid foundation for the new encryption storage and safe boot function. It uses special AES hardware to encrypt the data stored on the SSD, which will not affect the performance of the SSD, but also let the processor concentrate on processing the computing tasks. In addition, the secure boot feature ensures that the underlying software is not tampered with, and only apple trusted operating system software can be started at boot time.

It can be seen that in IMAC pro, T2 chip is mainly responsible for safe startup, encrypted storage and other functions, but also has some image signal capabilities.

Lei Feng net (public number: Lei Feng net), however, learned that since 2018, new Mac Mini、MacBook Air and MacBook Pro have been equipped with T2 security chips. With MacBook Air and MacBook Pro portability and special product patterns, Apple has introduced a new feature for them through T2 security chips

On the official website, Apple said all Mac laptops with Apple T2 security chips had a hardware disconnect feature and the microphone would be turned off as soon as the lid closed

Such a protection mechanism can be said to be the strictest in the industry.

Today, a similar protection mechanism appears on the iPad Pro 2020. Given Apple's strict privacy policy, this is no surprise.

However, in the absence of T2 security chip, iPad Pro 2020 can still realize the hardware blocking of microphone, which shows that Apple has built the corresponding controller module in iPad pro to ensure the safety, which is really painstaking.

Summary of Lei feng.com

For Apple, device safety has been given high priority, and the product concept has been reflected in the iPhone 5s released in 2013.

For example, Apple's touch ID encrypts the user's fingerprint information and stores it in the secure enclave coprocessor module built into the A7 chip. In fact, secure enclave is already widely available in Apple's current major product lines, including apple watch and homepod.

硬核防窃听!Mac

So the idea that the iPad, which will be released in 2020 and beyond, will be able to carry the hardware blocking function of a microphone, though not based on a T2 chip, can also be seen.

But in Lei Feng's view, the real key is: Although T2 chip is still MAC exclusive, but apple is more and more focused on building iPad products into computers, the iPad in the future is likely to get the same or higher configuration rights as MAC at the product level, and the T-series security chip is likely to no longer be MAC exclusive.

So what is to be expected is: will T2( or its iterative product) appear on future iPad?

For reference:

https://daringfireball.net

https://support.apple.com/zh-cn/guide/security/secbbd20b00b/1/web/1

https://support.apple.com/zh-cn/guide/security/sec59b0b31ff/1/web/1

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