1st round entailed an online assessment which included question in cryptography, networking, and C coding. 2nd round was a pretty lengthy follow-up on knowledge, as well as resume-based questions. Final round is a 30 minute presentation on the application of cryptography in networking, followed by extensive Q&A session. Pretty old-fashioned company, but seemed like an interesting place to work nonetheless.

First round was some light questions based on resume and assessment. Second round was a presentation they asked me to present in front of 7 employees including the CEO. They only talked about the presentation for 45 mins before spending 2 hours trying to grill you on everything they can think of (which is frustrating after spending so much time focusing on this presentation). It was a weird experience, but more so gave insight that it would be a weird place to work. Not one person cracked a smile in the three hours I was there and most people seemed to lack basic social skills.