Cybersecurity · Digital forensics · Front-end
I'm a Year 2 Cybersecurity and Digital Forensics student at Singapore Polytechnic. I build security tools and web projects.
Selected work
Security, web, and research projects I've worked on.
A client-server transfer protocol designed around authentication, confidentiality, integrity, and non-repudiation.
git clone https://github.com/Yikai-Tan/secure-file-transfer.git secure-file-transfer && cd secure-file-transfer && bash setup.shA Streamlit app that translates typed or spoken input and teaches useful travel phrases through short quizzes.
An experiment on how salt concentration affects the buoyant force on a miniature ship.
The previous version of yikai.dev, built to collect my projects, education, and achievements.
Experience & education
CSIT × Sentinel Work Experiential Programme
Validated national-level Cyberthon CTF challenges, tested challenge environments against LLM-assisted exploitation, and surfaced unintended paths and configuration weaknesses before launch.
Education
Singapore Polytechnic
Year 2. Studying secure software, programming, threat analysis, and digital forensics.
School of Science and Technology, Singapore
Developed an early interest in technology while taking on class leadership and music ensemble responsibilities.
Certifications
Community service
My class collected more than 10 kg of litter, then sorted and disposed of it properly.
As class vice-chairperson, I helped brief and coordinate the class as we cleared cigarette butts, glass shards, and other hazardous litter.
Clean public spaces depend on work most people never notice.
A clear plan turns a large job into something a class can finish.
Good instructions matter most when everyone needs to move together.
About
I'm Yi Kai, a Year 2 Cybersecurity and Digital Forensics student at Singapore Polytechnic.
I learn best by building things and trying to break them. That has taken me from validating Cyberthon CTF challenges and designing a secure file-transfer protocol to shipping small web tools and experiments.
Outside class, I take on operations, leadership, and community work. I care about making useful things, explaining them clearly, and finishing them properly.
Contact
