> Each file is broken into chunks and encrypted by iCloud using AES-128 and a key derived from each chunk’s contents that utilizes SHA-256. The keys and the file’s metadata are stored by Apple in the user’s iCloud account. The encrypted chunks of the file are stored, without any user-identifying information, using third-party storage services, such as S3 and Google Cloud Platform.
From what I’ve heard, Apple’s services run on their own cloud platform called Pie [0]. It sounds like this platform probably abstracts away whatever storage service is used, allowing Apple to use whatever fits their requirements.
> Each file is broken into chunks and encrypted by iCloud using AES-128 and a key derived from each chunk’s contents that utilizes SHA-256. The keys and the file’s metadata are stored by Apple in the user’s iCloud account. The encrypted chunks of the file are stored, without any user-identifying information, using third-party storage services, such as S3 and Google Cloud Platform.
From what I’ve heard, Apple’s services run on their own cloud platform called Pie [0]. It sounds like this platform probably abstracts away whatever storage service is used, allowing Apple to use whatever fits their requirements.
[0] - https://9to5mac.com/2016/10/06/report-unified-cloud-services...