Over the last two years, ransomware attacks have skyrocketed. And new research from blockchain surveillance firm Chainalysis shows that ransomware gangs are getting more sophisticated. But who's behind these attacks, where does the stolen money flow, and lastly, what should banks and financial institutions do to best prepare for such cyber-attacks? Our guest this week is Kimberly Grauer. She is the director of research at Chainalysis, where she examines trends in cryptocurrency and crime.

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