Device and method for improving efficiency of entering a password using a reduced keyboard

摘要

A method is provided for reducing a number of keys that a user is required to depress on a device having a keyboard with a limited number of keys when the user enters a password. The method comprising the following steps. A subset of characters used to define the password is determined. A filter to apply to the keyboard is determined in accordance with the determined subset of characters. The filter is applied when the user depresses the keys. Devices and computer readable medium for implementing the method are also provided.