Add section for App Store Encryption Export Regulations

Add section for App Store Encryption Export Regulations

[DmitriyKirakosyan]

Hello @antonys1 , thank you for reaching out!

We only use Apple's OS built-in encryption CommonCryptor, and save the encrypted file into the App's folder. The encrypted data is saved within an event and error logs until it can be sent over the internet. Before sending over the internet it gets decrypted and then it is sent over the internet with https request using NSURLSession.

Note, the only thing which gets encrypted is a transmission token, see:
https://github.com/microsoft/appcenter-sdk-apple/blob/2214f9ee2476f28af64cb38359defe59e85197a1/AppCenterCrashes/AppCenterCrashes/MSACCrashes.mm#L579
https://github.com/microsoft/appcenter-sdk-apple/blob/2214f9ee2476f28af64cb38359defe59e85197a1/AppCenter/AppCenter/Internals/Storage/MSACLogDBStorage.m#L73

The transmission target API is not documented and thus isn't officially supported. I believe you don't use this API. In such case, encryption is not happening on the AppCenter SDK side.

If you are not sure if you should specify if your app is using encryption I recommend you to reach out to Apple support team and consult on your specific case.

Thank you @DmitriyKirakosyan.