| 摘要 |
PROBLEM TO BE SOLVED: To prevent a third party from inferring a lock pattern to release a lock on an information communication terminal from a trace of an input pattern remained on a touch screen or a peep by another person.SOLUTION: An information communication terminal detects a vertical direction of a display unit of the information communication terminal, determines an inversion axis in a prescribed direction relative to the vertical direction, holds an inverted lock pattern to which a pre-registered lock pattern is inverted relative to the inversion axis, accepts an input gesture pattern, compares the gesture pattern with the inverted lock pattern, and releases a lock if the gesture pattern and the inverted lock pattern agree. |
