Was it written by an ESL speaker? Sometimes non-English speakers feel insecure starting a point without "However", "Because of this", and other conjunctions. If you don't need a conjunctions, you can say "Nowadays", but you don't need it. It's like the "auto" keyword in C. Because ESL speakers cram a lot of grammar into a few years, rather than spending years making simple sentences, they often use advanced patterns when simpler ones would suffice.
Also, the paper collected timestamps of each keystroke, something that'd need to done on suspects; however, if they are already suspecting you, they probably have other ways to identify you.
Finally, how in the world does a paper like this get away with having 'nowadays' in it? I know its a legit word, but, just seems awkward.