Touch Operation Device Lock Release Pattern Security
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Solution Overview
Problem
Conventional touch operation devices with pattern locks can be vulnerable to unauthorized access due to the potential for residual marks from fingers on touch panels, and the fixed position and direction of input patterns make them susceptible to estimation and unauthorized lock release.
Innovation Solution
A touch operation device with a lock control portion, image generation portion, and storage portion that generates a lock release screen with guides and symbols, where the user inputs a pattern connecting guides, and the system confirms the starting guide and pattern shape match the registered release pattern to release the lock state, enhancing security by making it difficult for unauthorized users to replicate the exact input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pattern lock method is used on a touch panel, then unauthorized use can be prevented, but drawing marks from finger contact may be left on the panel allowing unauthorized access
Solution Approach 1:
The patent replaces the mechanical contact-based touch panel input method with a non-contact detection method. The touch panel detects finger proximity or movement without requiring physical contact, thereby preventing drawing marks while maintaining pattern lock functionality. This substitution resolves the contradiction by eliminating the harmful effect of finger contact without sacrificing the security of the pattern lock mechanism.
2Ease of operation
If the pattern position and direction are kept constant for easy recognition, then user convenience is improved, but the pattern can be easily estimated and unauthorized lock release occurs
Solution Approach 1:
The patent implements dynamic changes to the pattern lock mechanism by randomly changing the position and direction of the pattern on the touch panel each time the lock is activated. This dynamic adjustment maintains user convenience through familiar interaction gestures while significantly enhancing security by preventing unauthorized users from estimating or replicating the pattern based on fixed positions.
3Object-affected harmful factors
If non-contact touch panel detection is used to prevent drawing marks, then drawing marks are eliminated, but the pattern position and direction remain constant creating new security vulnerabilities
Solution Approach 1:
The patent combines non-contact detection technology with dynamic pattern repositioning and rotation. The touch panel detects input without contact to prevent drawing marks, while simultaneously changing the pattern's position and direction each time to prevent estimation attacks. This combination resolves both security vulnerabilities addressed in the prior art.
Data Source
AI summary
A touch operation device displays a lock release screen on a touch screen. The lock release screen includes a plurality of guides which are arranged according to a predetermined rule and a plurality of symbols which are arranged around the guides. One of the guides is set to a start guide. Release symbols are arranged around the start guide. The touch operation device releases lock state when the first guide of an input pattern agrees with the start guide and the shape of the input pattern agrees with the shape of a release pattern.