I was contacted by a recruiter, I did three phone interviews with different members of the information security team and then was scheduled for about four hours of interviews in one day. The first part they asked me to make a presentation about a technical project I've done. I wrote one up but kept company specific details out of it. During the course of the presentation, I was pressed for those details and they seemed annoyed that I wouldn't divulge them. Then we took a break before a couple one on one interviews, expect they never came back. I called my recruiter and they told me that they decided to stop the interview process because I didn't share enough technical details. They weren't considerate enough to share that with me, I had to call in and find out.