Each attempt takes 80 ms. That&#x27;s in hardware. There is a separate retry delay that increases exponentially then tops out at 1 hour per unsuccessful attempt. The 10-try limit is the number of consecutive unsuccessful attempts before the device erases its stored encryption keys (effectively wiping itself).<p>It seems that the attempt limit at least is not hardcoded and can be updated, as it has been increased in the past by an iOS update. I would suspect the same is true for the attempt retry delay time. Either way, this is only specifically applicable to devices newer than the 5c, which doesn&#x27;t have a Secure Element (or &quot;Secure Enclave&quot; in Applespeak).<p>In any case, given a software image made to the FBI&#x27;s specifications, the time to crack a phone depends on the complexity of the user passcode. If the user had a 4-digit numeric PIN it could be cracked in under 15 minutes. On the other hand, with a sufficiently complex passcode the expected time to brute force the device could be literally in the millions of years.