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I could find references to "hardware-accelerated AES encryption" on an iPhone/iPad. But the APIs that I could find to do the AES encryption (CCCrypt) don't talk about hardware-acceleration at all.
Does anyone have any idea if these APIs are the ones that are hardware-accelerated or are there other ones?
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Each iOS device includes a dedicated Advanced Encryption Standard (AES 256) cryptography engine to support hardware-level iPhone encryption, and it sits between the system memory and flash storage.
iOS devices have benefitted from hardware encryption for nearly a decade now, and Apple uses AES-256, which is what banks use for transactions. When data is encrypted no matter the state, and the key is generated and stored on-device, it is called end-to-end encryption.
Apple makes use of AES 256-bit encryption for iPhone encryption. 256-bit AES encryption is considered a very strong encryption standard and can provide a great level of security for data stored in your iPhones. Similar to other full-disk encryptions, iPhone encryption also protects data that is at rest.
All replies. All versions of Safari support 128 bit encryption.
Yes.
As of 4.3, if the message has >64 blocks (i.e. 1024 bytes), the CCCrypt function for AES will use the hardware-accelerated implementation. (This is done by ioctling with /dev/aes_0, BTW.)
Besides AES, SHA-1 is also hardware-accelerated when the input is > 4096 bytes.
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The whole point of an API is that you don't need to care about the implementation details that back it. The implementor (Apple, in this case) will use whatever implementation gives the best performance and energy usage characteristics on whatever hardware is in use. That might be a hardware implementation, or it might be a software implementation, it might depend on the block size for which you are calling the function.
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