PIN Entry Device Text Segmentation for Secure Survey Input
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Solution Overview
Problem
Existing PIN entry devices (PEDs) face challenges in obtaining accurate and credible customer feedback while maintaining strict security, as they either prolong customer dwell time or compromise security by allowing unapproved text inputs.
Innovation Solution
A PIN entry device with an alphanumeric display and numeric keypad that distinguishes between approved and unapproved text, allowing only single-key responses to unapproved text and incorporating a time delay to prevent fraudulent PIN acquisition, enabling secure customer feedback during transactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the PED displays unapproved text and allows multi-key input responses, then customer feedback accuracy improves, but security against fraudulent PIN acquisition deteriorates
Solution Approach 1:
The patent segments the text display into two distinct categories: approved text (system-generated, security-verified) and unapproved text (arbitrary, feedback-related). The numeric keypad is selectively enabled only for approved text, while unapproved text receives only function key responses. This segmentation resolves the contradiction by allowing feedback functionality without compromising PIN security.
Solution Approach 2:
The patent introduces function keys as an intermediary response mechanism for unapproved text. Instead of allowing direct numeric keypad input to arbitrary text (which would enable PIN fraud), the system mediates through function keys that can convey feedback information without exposing the numeric keypad. This intermediary approach enables feedback collection while maintaining security boundaries.
2Loss of information
If the PED asks customer questions during transactions, then feedback collection improves, but customer dwell time increases
Solution Approach 1:
The patent implements partial action by limiting feedback interaction to single function key presses rather than requiring multi-key sequences or extended responses. This partial engagement allows feedback collection with minimal time investment from customers, resolving the contradiction between information gathering and time efficiency.
Solution Approach 2:
The system allows customers to rapidly provide feedback through single function key presses and immediately proceed with their transaction. The feedback mechanism is designed to be quickly skipped through without requiring customers to dwell at the PED, enabling both feedback collection and rapid transaction completion.
3Reliability
If the numeric keypad is disabled for unapproved text, then PIN security improves, but feedback input capability deteriorates
Solution Approach 1:
The patent makes the function keys universal by enabling them to serve dual purposes: traditional transactional functions and feedback response mechanisms. This multi-functionality allows the function keys to provide feedback input capability without requiring numeric keypad activation, thus maintaining PIN security while preserving feedback versatility.
Data Source
AI summary
The system includes a PIN entry device (PED) for electronic Point of Sale (EPOS) transactions and enhanced security for consumer survey processing. In addition to the usual PED functionality and financial transaction processing, the system allows feedback from a user to be obtained in response to a question. The system displays a text to the user on a display, and prompts a response from the user. The displayed text is determined to be either an approved text (i.e., part of financial transaction) or an unapproved text (i.e., a response to consumer survey). The system and PED are configured to accept responses entered by the user in response to the approved text, and to accept only a single key press response when prompted by a display of the unapproved text, limiting or avoiding a possibility of fraudulently extracting user PIN through consumer survey questions.