Tok Yee Ching

Home / People / PhD Students / Tok Yee Ching

PhD Student

Pillar / Cluster: Information Systems Technology and Design


Assistant Professor Sudipta Chattopadhyay


Yee Ching is currently a PhD student at Singapore University of Technology and Design (SUTD), under the supervision of Assistant Professor Sudipta Chattopadhyay. Before pursuing his PhD, he was a Threat Hunter at Countercept where he helped to detect, respond and reduce impacts caused by malicious attackers to clients’ critical assets. In addition to his academic pursuits, Yee Ching actively engages the information security industry as an Executive Committee member in the Association of Information Security Professionals (AiSP), Adjunct Lecturer in Singapore Polytechnic and a SANS Teaching Assistant/Virtual Teaching Assistant for SANS Institute.

Research Interests

  • Security assessment: Systems, applications, Internet-of-Things (IoT) and Cyber-Physical Systems (CPS)
  • Attack detection
  • Malware


  • MSc Information Security – Royal Holloway, University of London (2017)
  • BSc Computing and Information Systems – University of London (2013)

Working Experience

  • Committee Member – Association of Information Security Professionals (AiSP) (2017 – present)
  • SANS Internet Storm Center Handler (2021 – present)
  • SANS Teaching Assistant/Virtual Teaching Assistant (vTA) (2019 – present)
  • SANS Mentor – SANS Institute (2014 – 2019)
  • Adjunct Lecturer – Singapore Polytechnic, School of Digital Media & Infocomm Technology (2014 – present)
  • Threat Hunter – F-Secure Countercept (formerly Countercept, by MWR InfoSecurity) (2016 – 2018)

Awards and Achievements

  • Grayhat (formerly Texas Cyber Summit) 2020 OpenSOC CTF – Winner (2020)
  • The Cybersecurity Awards – Professional Award (2019)
  • Singapore Digital (SG:D) Scholarship (Postgraduate) [formerly National Cybersecurity Postgraduate Scholarship (NCPS)] (2017 – Present)
  • Royal Holloway Travel Award (2017)
  • Santander Travel Award (2017)
  • SANS Cyber Defense NetWars Challenge Coin (2017)
  • SANS SEC503 NetWars IDS Challenge Coin (2017)
  • SANS SEC504 Capture-the-Flag Victor Challenge Coin (2016)
  • SANS ICS515 Challenge Coin (2016)
  • SANS NetWars Challenge Coin (2016)
  • SANS Lethal Forensicator Challenge Coin (2016)
  • SANS SEC542 Capture-the-Flag Victor Challenge Coin (2015)
  • SANS SEC561 Capture-the-Flag Victor Challenge Coin (2015)
  • SANS SEC560 Capture-the-Flag Victor Challenge Coin (2015)

Common Vulnerabilities and Exposures (CVE) IDs

  • CVE-2017-13664
  • CVE-2017-13663

Selected Publications

  • Yee Ching Tok, Chundong Wang, and Sudipta Chattopadhyay, “STITCHER: Correlating Digital Forensic Evidence on Internet-of-Things Devices“, Volume 35, 2020, Forensic Science International: Digital Investigation
  • Chundong Wang, Yee Ching Tok, Rohini Poolat, Sudipta Chattopadhyay, and Mohan Rajesh Elara, “How to secure autonomous mobile robots? An approach with fuzzing, detection and mitigation“, Volume 112, 2021, Journal of Systems Architecture