Quote:
Originally Posted by alanHd
Ive just googled it for fun, the answer given was 6.63 quadrillion. The funny thing is on the site I read the answer, the people were stating that 8 digit passwords are not secure enough against brute force attacks, they recommend 10 at least.
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It all depends on the system being used. The iPhone has to query the hardware for a key and even with the proposed software update that the FBI have requested there's an 80ms delay. Which means that if you use the already available 6-character alphanumeric passcode it would take 6.5 years to try all possibilities.
I suspect the advice about 10 digits (or characters?) was based on a system where you can retry as quickly as you can generate the next value.