Keyboard Input Delay Algorithm for Anti-Automation Testing
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Solution Overview
Problem
Existing automated test tools, such as Unified Functional Testing (UFT) Device Replay, struggle to mimic human-like keyboard and mouse inputs due to their inability to replicate the natural delays between keystrokes and mouse clicks, which are detectable by anti-automation mechanisms.
Innovation Solution
A keyboard model anthropomorphic algorithm that determines the input delay between each character based on the distance between keys on the keyboard, mimicking human typing behavior by introducing delays that vary with the proximity of keyboard keys.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated test tools enter input strings simultaneously without delays, then testing efficiency is improved, but detectability by anti-automation mechanisms increases
Solution Approach 1:
The system dynamically adjusts input timing by calculating delays between individual characters based on their physical distance on the keyboard layout. Instead of static simultaneous input, the algorithm introduces variable time intervals that mimic human typing patterns, where closer keys produce shorter delays and farther keys produce longer delays.
Solution Approach 2:
The system changes the time parameter of input by introducing delays between characters. The delay duration is calculated based on the Euclidean distance between key positions on the keyboard layout, transforming the input pattern from simultaneous to sequential with variable intervals that replicate human behavior.
2Loss of time
If the entire input string is entered at once, then the testing process is faster, but it becomes easily distinguishable from human input
Solution Approach 1:
The system segments the input string into individual characters and processes them sequentially rather than as a single block. Each character is entered separately with calculated delays between them, breaking down the monolithic input operation into discrete timed events that mimic natural human typing behavior.
Solution Approach 2:
The system performs preliminary calculation of delays between each pair of consecutive characters based on their keyboard positions before executing the input sequence. This pre-computed timing information is then applied during input execution to ensure realistic timing patterns.
3Reliability
If delays are introduced between each character to mimic human typing, then anonymity is improved, but input speed decreases
Solution Approach 1:
The system applies different delay durations to different character transitions based on their specific positions on the keyboard layout. Characters that are physically closer together receive shorter delays, while characters farther apart receive longer delays, creating locally optimized timing that reflects actual human typing patterns rather than using a uniform delay.
Data Source
AI summary
Method and system to improve keyboard input in an automated test environment. The method includes determining a keyboard layout. The method also includes receiving an input, wherein the input comprises a plurality of characters. The method further includes processing the input to determine an input delay between each character of the plurality of characters and entering each character of the plurality of characters with the determined input delay between each character.