[Serious] What would you give a cybersecurity professional for their birthday?

My closest friend is finishing up his masters in cybersecurity. I'd like to get him a gift related to that field for his upcoming birthday. Ideally this would be a gift that he would actually have fun with or find useful, and I'm asking because I know very little about the tools of that particular trade. He seems to be most interested in penetration testing and physical security devices. He's recently bought a flipper zero and things like lock pick …

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