Becoming a leading expert on the Borg was never something she set out to do. And yet, in the wake of emerging on the clear other side of Borg Space, she found herself practically rewriting some of the reports submitted during the Battle of Wolf 359. Picard's logs in particular had been a valuable asset when she was first formulating that plan, but now they were practically irrelevant in the face of what she now knew, what she had experienced firsthand. (What Seven has experienced.)

"It was Borg technology," she concludes, giving his hand a gentle squeeze. "Technology I am willing to bet the Romulans who integrated it into that mining ship didn't know how to properly use. Borg integrations can be a powerful asset, but they are to be utilized with great caution. If not adapted properly, the technology would still resonate with a distinctive Borg signature — a considerably more advanced Borg signature, which the Collective would have immediately perceived as a threat."

Kathryn doesn't know that drones from the 24th Century already went back in time and attempted to draw the Collective towards the Alpha Quadrant during the events of First Contact. Thus, she assumes that the futuristic signatures were caught on long range sensors, drawing the Borg towards Earth a good century before they ought to have taken interest in humanity.