I was at Microsoft for meetings once and one of the guys asked if I was a cryptographer. I replied that it depends on who else is in the room. If it's just me and my boss, I'd probably qualify as being a cryptographer. But if I'm in the room with Niels Ferguson or Adi Shamir, I should be considered a software engineer who is somewhat decent at reading math papers. At about the same time, Niels Ferguson walked in the room and I quickly commented "you should not consider me a cryptographer for the rest of this meeting."