Dual PIN Code Authentication for Portable Devices
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Solution Overview
Problem
Conventional portable devices, such as mobile phones, require users to perform cumbersome operations to unlock functions, and the need to input a four-digit PIN code for all functions detracts from convenience, while reducing the PIN code's digit number compromises security.
Innovation Solution
Implementing a dual PIN code system where a shorter PIN code (simplified PIN code) is used initially for easy unlocking, and a longer PIN code is required only if the initial attempt is unsuccessful, allowing for customizable locking of functions based on importance and reducing user burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a four-digit PIN code is used for unlocking, then security is improved, but ease of operation deteriorates due to cumbersome input operations
Solution Approach 1:
The PIN code input process is segmented into two distinct stages: a first stage with a shorter PIN code for quick authentication, and a second stage with a longer PIN code for enhanced security. This segmentation allows the system to balance convenience and security by offering different authentication depths based on user needs.
Solution Approach 2:
The system dynamically adjusts the PIN code length requirement based on the authentication stage. The first stage uses a shorter PIN code (e.g., 2-3 digits) for rapid access, while the second stage requires a longer PIN code (e.g., 4-6 digits) for stronger security. This dynamic adaptation resolves the contradiction between ease of operation and security.
2Ease of operation
If the digit number of PIN code is reduced for easier unlocking, then ease of operation is improved, but security deteriorates due to increased probability of accidental coincidence
Solution Approach 1:
The authentication system is divided into two stages with different security levels. The first stage uses a shorter PIN code for convenience, while the second stage uses a longer PIN code for security. This segmentation allows the system to provide easy operation when needed while maintaining security capabilities when required.
Solution Approach 2:
The system applies partial authentication (shorter PIN) when full security is not required, enabling easier operation in low-risk scenarios. However, the full authentication capability (longer PIN) remains available when higher security is needed, thus resolving the contradiction between ease of operation and security.
3Device complexity
If a single PIN code is used for all functions, then device complexity is reduced, but adaptability deteriorates as it cannot accommodate varying importance of different functions
Solution Approach 1:
The system assigns different PIN code length requirements to different authentication stages and potentially different functions. Critical functions can require the second stage with longer PIN codes, while less critical functions can be accessed with the first stage shorter PIN code. This local differentiation enhances adaptability without significantly increasing overall system complexity.
Solution Approach 2:
The authentication requirements are made dynamic, allowing the system to adjust the PIN code length based on the specific function being accessed and the security level required. This dynamic approach enables the system to adapt to varying function importance while maintaining a relatively simple underlying architecture.
Data Source
AI summary
A method of unlocking at least one of functions provided to a portable apparatus is provided which includes: judging whether or not an predetermined first code is entered; second judging whether or not a predetermined second code is entered, wherein the character length of the predetermined first code is shorter than the character length of the predetermined second code, if the predetermined first code is not entered; and unlocking the one of functions provided to the portable apparatus, if the predetermined first or second code is entered. A portable apparatus with plurality of functions is provided which includes: a controlling means for setting a first code and a second code; and a storing means for storing the first code and the second code, wherein the controlling means judges whether or not the first code is entered; the controlling means judges whether or not the second code is entered, where in the character length of the first code is shorter than the character length of the second code, if the first code is not entered; and the controlling means unlocks at least one of functions provided to the portable apparatus, if the first or second code is entered.