Prove you know a secret.
Never reveal the secret.

Zero-knowledge proofs are one of the most beautiful ideas in cryptography: a way to convince someone a statement is true while telling them nothing about why it's true. This course builds the idea from the ground up — every primitive first, every concept playable — designed as a weekly ritual: one chapter a week, about 15 minutes each.

🗺️ The Course Map

You'll climb from clock arithmetic all the way to proving your age without revealing your birthdate. Chapters build on each other — finish the checkpoints to earn XP, badges and levels.

📅 The 15-Minute Weekly Program

Eight sessions, one per week. Each chapter follows the same rhythm so it fits in a coffee break: read the concepts (~6 min), play the interactive widget until it clicks (~6 min), then clear the checkpoint quiz (~3 min). Everything else — XP, badges, levels — is saved automatically between sessions.

🎖️ Badge Shelf

Sixteen badges to collect. Some are earned by finishing chapters; a few hidden ones require doing something clever inside the interactive widgets…

🧭 What you'll be able to do

• Explain the three properties of a ZK proof — completeness, soundness, zero-knowledge — and why each one is non-negotiable.
• Wield the primitives underneath ZK: modular arithmetic, hash functions, one-wayness and commitment schemes.
• Play both roles of an interactive proof as the graph 3-coloring protocol runs round by round — and catch a cheating prover.
• Run a real Schnorr Σ-protocol with live big-number math, then turn it into a non-interactive signature with Fiat–Shamir.
• Understand how modern zk-SNARKs turn arbitrary programs into arithmetic circuits, and what "knowledge" means there.
• Build selective disclosure flows: prove age ≥ 18, country ∈ EU or balance ≥ X while everything else stays hidden.