If you have an all-numeric passcode which isn't a "simple passcode", it doesn't display length, but does show only the numeric keypad, indicating to an attacker

If you have an all-numeric passcode which isn't a "simple passcode", it doesn't display length, but does show only the numeric keypad, indicating to an attacker it's only numeric. I personally would rather enter a 12 digit numeric to an 8 character alphanumeric. (Also included 80 character full upper/lower with numbers and symbols, but this is unrealistic given how many keypresses are required for modifiers.) <PRE> 10^12 = 1000000000000 36^8 = 2821109907456 80^6 = 262144000000 80^7 = 20971520000000 At 10 Hz, the first two options get you 3000 to 10000 years. A reasonable lower bound, given 10Hz on the tries, is 10^9 = 100000000 36^6 = 60466176 80^5 = 40960000 47-90 days. </PRE>