This publication disclosed a great stylus signature use case for login app/system,
encryption/decrypt file and generating password. Signature on different people will be
with different “Inking pressure”, “Holding force”, “Moving speed”, “Writing angle”,
“Writing direction” and “Signature shape”. System can check such rich stylus data to do
Signature Matching job. Signature is easier to remember and harder forged by hacker.
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INC, HP, "ACTIVE SIGNATURE MATCHING WITH RICH STYLUS DATA", Technical Disclosure Commons, (October 04, 2018)