<p>Sieberrsec CTF (SCTF) is a beginner-to-intermediate cybersecurity Capture The Flag competition run exclusively for secondary school and pre-university students in Singapore, now in its seventh edition. The organisers prioritise accessibility, pairing the competition with training resources to support participants new to CTFs.</p> <ul> <li>Eligibility: students currently enrolled in Singapore secondary schools or pre-university institutions</li> <li>Structure: optional physical training week (1–5 June 2026), online qualifiers (17 June 2026), and in-person finals (24 June 2026)</li> <li>Separate prize categories for Pre-University and Secondary levels</li> <li>Pre-University cash prizes: S$2,000 (1st), S$1,200 (2nd), S$800 (3rd), with runner-up prizes down to 5th place</li> <li>Secondary cash prizes: S$1,000 (1st), S$600 (2nd), S$400 (3rd), with runner-up prizes down to 5th place</li> <li>All finalists receive Sieberrsec merchandise; main sponsor is CSIT (MINDEF)</li> </ul> <p>Registration for SCTF 7.0 closes on 16 June 2026; subsequent editions are typically held annually around June.</p>