NIZKCTF: A Non-Interactive Zero-Knowledge Capture the Flag Platform

TL;DR

NIZKCTF introduces a secure, open-audit Capture the Flag platform utilizing non-interactive zero-knowledge proofs to enhance fairness and security in cybersecurity competitions.

Contribution

It is the first CTF platform to incorporate non-interactive zero-knowledge proofs for security and transparency.

Findings

Enhanced security against unfair advantages

Open-audit capability for transparency

First implementation of NIZK proofs in CTFs

Abstract

Capture the Flag (CTF) competitions are increasingly important for the Brazilian cybersecurity community as education and professional tools. Unfortunately, CTF platforms may suffer from security issues, giving an unfair advantage to competitors. To mitigate this, we propose NIZKCTF, the first open-audit CTF platform based on non-interactive zero-knowledge proofs.