The guy from military who is speaking right now, he is saying he is specialized in "deception" warfare:
D5:
Deception, Disruptyon, Denial, Degradation And Destruction
Conversely, Cyber Command primarily derives its authority from Title 10 and is responsible for conducting military computer network operations, which involves accessing computer networks for the purpose of creating noticeable effects on them. These effects, which are intended to support a specific military objective, are typically one of the “5 Ds”: deny, degrade, disrupt, deceive, or destroy.
https://www.wired.com/beyond-the-beyond/2019/04/deny-degrade-disrupt-deceive-destroy/