itwbennett writes: Entering passwords on smartphones is unnecessarily painful, says security research Markus Jakobsson. In addition to having to enter text on a tiny keyboard, there's no auto-correct feature, but there could be and it could be used securely if we use pass sentences instead of passwords. Consider the pass sentence 'frog work flat'. How secure is that? 'The frequencies of these words in the English language are 10 to the -5.13, 10 to the -3.20 and 10 to the -4.36. The combination therefore occurs with probability 10 to the -12.7 — the product of those three frequency values — or approximately 2 to the -42. That is a strong credential,' says Jakobsson.