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A method and system for enhancing security of touchscreen unlock

IP.com Disclosure Number: IPCOM000235008D
Publication Date: 2014-Feb-24

Publishing Venue

The IP.com Prior Art Database

Abstract

This patent mainly describes a new method and system, which improve the current security of touchscreen unlock of mobile terminal. And the article contains the detailed description of the implementation and its functional flowcharts.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 51% of the total text.

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A method and system for enhancing security of touchscreen unlock

Along with the popularization of mobile terminal, there are many kinds of touchscreen unlock methods, the most common is: At

least two pre-designed touch points; receiving unlock information from the input of touch points; judge the consistency between the

input sequence and preset sequence of touch points to determine unlock or not . However, the unlock method above has the

following disadvantage: The unlock pattern must be a continuous broken line(see FIG. 1) with poor safety, it even could easily be

seen from the unlocking traces on the screen and is easy to be cracked, which would lead to the disclosure of private information.

Aiming at the disadvantage of the unlock method mentioned above, the invention provides a method and system for enhancing security of touchscreen unlock.

According to one aspect of the present invention, providing a method for enhancing security of touchscreen unlock, which contains

such steps below:


1. Preset unlock patterns: After user finishes drawing a continuous broken line, wait a period of time for user to start another

continuous broken line drawing. If there is no new drawing during the waiting time, it indicates that user has finished all the

drawings. Save all the broken lines(including their orders) drew by user.


2. Unlock: When screen is locked, user inputs his discontinuous unlock patterns: After user finishes inputting a continuous broken

line, wait some time for user to start another continuous broken line input. If there is no new input during the waiting time, it

indicates that user has finished all the inputs. Get all the broken lines(including their orders) inputted by the user, then judge the

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consistency between the input broken lines sequences and the preseted broken lines sequences of touch points to determine

unlock or not.

According to another aspect of the present invention, providing a system for enhancing security of touchscreen unlock, which

contains such modules below:


1. Storing module: For storing all the discontinuous unlock broken lines preseted by user;


2. Obtaining module: For obtaining all the discontinuous broken lines inputted by user when unlocks the screen;


3. Judging module: For Judging the consistency between the input broken lines sequences and preset broken lines sequences of

touch points to determine unlock or not;


4. Executing module: According to the result of judging module, execute unlock or not.

Compared to current technology, the present invention "A method and system for enhancing security of touchscreen unlock"

improves the safety of unlock of mobile terminal.

FIG. 1 is an example of renderings of the most common unlock method .

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FIG. 2 is the flowchart of method "Preset unlock patterns" according to one embodiment of the present invention .

FIG. 3 is the flowchart of method "Unlock" according to one embodiment of the present invention .

FIG. 4 is the blo...