Thank you for sharing this, very interesting! Although a bit old (2015), the article raises some questions on privacy & transparency, which are more important than ever (eg: the increasing legislation like GDPR, CCPA).

Luckily, the TypingDNA solution is secure and compliant, in accordance not only to the Privacy laws (GDPR, CCPA), but also to other kind of legislation like Strong Customer Authentication (SCA) required by the EU Payment Services Directive (PSD2)