Earlier this month, a group called ShinyHunters took responsibility for a hack on the education platform Canvas, which is used for coursework at colleges. In a letter posted online, the group threatened to leak data it took from the platform, including billions of private messages between students and teachers. Canvas was also temporarily unavailable, disrupting students’ ability to do their work.

Then, last week, Instructure, which makes Canvas, said it had reached a deal with the hackers, that the data had been returned and all copies destroyed. Marketplace’s Stephanie Hughes asked Rachel Tobac, CEO at Social Proof Security, what we know about the deal.