This Wired story from 2019, September describes the road taken by Air Force to decide to offer an orbiting satellite for “testing” by hackers at DEFCON 28.

After a F-15 fighter last year, Air Force will enable a select number of researchers to evaluate the security of an orbiting satellite from an attacker perspective. At the time of writing of the article the satellite targeted was unknown.

On December the 12th, Aviationtoday.com released an update but the satellite was yet to be chosen, according to Will Roper, assistant secretary of the Air Force for acquisition, technology, and logistics. Internal Air Force project name is “Hack-A-Sat”, public one will presumably be “Space Security Challenge”.