bushwhacker2000 alerts us to the dilemma of Thomas Dullien, a prominent security researcher who has been a fixture at the annual Black Hat security conference. Dullien was denied entry into the US
on his way to this year's conference. Dullien, a German reverse-engineering expert known in hacker circles as "Halvar Flake," said he was blocked from entering the US on the technicality that he had (years ago) signed a contract with Black Hat as an individual, not as his company. Customs agents said he would need an H1-B visa to perform the contracted two days of training at Black Hat, and put him on the next plane back to Germany.