It's insanely difficult for a person to change the way they use a mouse and keyboard.
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u/Magga_ said that his technique was able to determine unique players 100% of the time from the mouse dataset, while keyboard fingerprinting was able to pick the right player 98% of the time. Since both metrics measure entirely different movements, combining them makes for highly accurate detection. There are concerns that unrelated people could potentially have the same play style, especially as Counter-Strike 2 still has over 1.2 million players at peak, resulting in false positives. However, u/Magga_ said that even though complete strangers can have similar signals for either mouse or keyboard, there’s very low statistical probability that two people would have similar mouse and keyboard habits.
“Across pairs of strangers, the correlation between how alike their mouse habits are and how alike their keyboard habits are is just 0.11, where 0 means unrelated and 1 means they always go together,” the researcher wrote. Interestingly, they faced an obstacle during the testing of their method for a time after it kept on returning a number of “false positives.” But once they investigated deeper, u/Magga_ found out that these accounts were actually related to each other, revealing unknown account pairs and even connecting four different accounts to one person.
They even claimed that this method of fingerprinting accounts and matching them to specific players isn’t a proof of concept but a working system. It’s designed to take in demos and link accounts continuously, allowing it to build a reference system with every uploaded match. Despite the massive number of matches and players that it must handle, it’s designed to work on a single 20GB slide of an Nvidia A100 GPU. Still, the author said that the amount of data they tested on it is pretty thin, and they want to see it in action on the real population size of CS2 players. Another limitation they noted is that shared accounts would break the system.
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Key considerations
- Investor positioning can change fast
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Reference reading
- https://www.tomshardware.com/video-games/pc-gaming/SPONSORED_LINK_URL
- https://www.tomshardware.com/video-games/pc-gaming/researcher-develops-method-for-fingerprinting-cheaters-using-counter-strike-mouse-and-keyboard-input-patterns-says-technique-can-be-used-so-bans-follow-users-even-if-they-make-new-accounts#main
- https://www.tomshardware.com/membership
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