Comment Re:Double the delay every failed attempt (Score 2) 114
Like iOS does it? Starting with 1 minute after 6 failed attempts, and then increasing the delay each time another pin code is entered.
Comment Re:Easy peasy (Score 5, Informative) 179
brute force != solving a sudoku
You can't brute force a sudoku, it would take about 1450 billion years using a super duper computer using only brute force. But you could use different solving techniques. Quote Peter Norvig:
"First, we could try a brute force approach. Suppose we have a very efficient program that takes only one instruction to evaluate a position, and that we have access to the next-generation computing technology, let's say a 10GHz processor with 1024 cores, and let's say we could afford a million of them, and while we're shopping, let's say we also pick up a time machine and go back 13 billion years to the origin of the universe and start our program running. We can then compute that we'd be almost 1% done with this one puzzle by now." http://norvig.com/sudoku.html
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