Daniel Swann is exactly the type of person the National Security Agency would love to have working for it. The 22-year-old is a fourth-year concurrent bachelor's-master's student at Johns Hopkins University with a bright future in cybersecurity.

And growing up in Annapolis, Md., not far from the NSA's headquarters, Swann thought he might work at the agency, which intercepts phone calls, emails and other so-called "signals intelligence" from U.S. adversaries.

"When I was a senior in high school I thought I would end up working for a defense contractor or the NSA itself," Swann says. Then, in 2013, NSA contractor Edward Snowden leaked a treasure-trove of top-secret documents.