Questions about applying for a PhD in Applied Cryptography (OIST 2026)

Hi everyone,

I’m very interested in pursuing a PhD in Applied Cryptography at OIST (Okinawa Institute of Science and Technology) in Japan, fully funded for 2026. My background is in Computer Science (Bachelor’s degree), and I’m passionate about cybersecurity, cryptography, and AI.

Since I don’t have a Master’s degree, I was wondering:

1. Is it realistic to apply directly to a PhD program in Applied Cryptography with just a Bachelor’s degree?
2. What kind of background do admissions committees usually look for (publications, projects, strong math, etc.)?
3. How important is having research experience vs. just good coursework?
4. Would contributing to open-source cryptography/security projects strengthen my application?
5. Any advice on how to frame my interest in cryptography + AI + cybersecurity in the application?
6. Is there room for combining AI with cryptography research in PhD applications, or is it better to focus solely on cryptography?

I’d love to hear from anyone who has experience applying to cryptography, AI, or security-related PhD programs, especially OIST.

Thanks in advance!