Does iPhone support hardware-accelerated AES Encryption?

ios aes hardware-acceleration cryptography
Bala picture Bala · Jan 27, 2011 · Viewed 9.3k times · Source

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?

Answer

kennytm picture kennytm · Mar 22, 2011

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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