Well, I asked the interviewer if by asymmetric he meant something like PKI, and all I got was a frown. And I was like symmetric encryption is just normal. I think I was more caught off guard, as well as just not thinking much about it. I got all the PAM questions right if that helps. Probably doesn't. I feel genuinely humiliated by the whole situation.

Seriously in the back of my head I heard my Father's voice: "You done fucked up good, boy"

EDIT FOR FATHER QUOTE