Supervised by Dr Haibo Hu and coached by Mr Kong Chun Ho (EIE MPhil student), a PolyU team comprised of Ma Kam Wa (BSc in INS student), Leung Hon Lam (BSc in INS student), Cheng Shiu Wang Ethan (BSc in IMT student) and Sham Wing Chung (COMP student), attained the Second Runner-up in the Capture the Flag (CTF) Cybersecurity Competition which was organized by the PricewaterhouseCoopers (PwC) in their HackaDay 2021 on 1 December 2021. The competition aims at increasing the general awareness of the importance of cybersecurity among the youths in Hong Kong and Macau. The HackaDay also serves as a platform for the future talents to raise their competency level for a meaningful career in cybersecurity. Around 80 students in 21 teams from Hong Kong and Macau joined this competition which tested their technical knowledge and analytical skills under five hacking challenges.