Zcash
How to actually send money privately — and why Bitcoin can't.
From a public Bitcoin ledger to fully private payments — learn how Zcash hides sender, receiver, and amount using zero-knowledge proofs.
Bitcoin writes every payment — who, to whom, how much — into a public ledger that never forgets: great for auditors, terrible for privacy. Zcash keeps that public, verifiable ledger but hides the sensitive parts using zero-knowledge proofs — math that confirms a payment is valid without revealing the sender, receiver, or amount.
Built from the ground up, this topic covers:
- Why Bitcoin leaks — how a public ledger that never forgets exposes who paid whom and how much.
- Private money, defined — what “privacy” actually means for payments, and what it doesn’t.
- Zero-knowledge proofs — the cryptography that proves a payment is valid while hiding its details.
- Inside the Zcash machine — how the protocol bolts privacy onto a verifiable public ledger.
- A genuinely anonymous transaction — walking through a shielded payment end to end.
- De-anonymizing mistakes — the slip-ups that quietly unmask people who thought they were safe.
By the end you’ll know how to actually send money privately — and exactly why Bitcoin can’t — a solid intermediate rung on the crypto ladder.
In this topic
- 1 What Is Zcash? Private Digital Cash, Explained Zcash is a cryptocurrency that lets you prove a payment is valid without revealing who paid whom or how much. Learn how shielded transactions and zero-knowledge proofs work. 11 min
- 2 Why Bitcoin Isn't Private Bitcoin is a public, permanent ledger — every payment, sender, and amount is readable forever. It's pseudonymous, not anonymous, and very traceable. 8 min
- 3 What "Private Money" Actually Means The four properties of financial privacy — sender, receiver, amount, unlinkability — and what Bitcoin actually hides versus reveals on-chain. 7 min
- 4 Three Roads to Privacy — Mixers, Monero, Zcash How CoinJoin mixers, Monero ring signatures, and Zcash zk-SNARKs hide payments — what each conceals, and exactly where each one leaks. 9 min
- 5 Zero-Knowledge Proofs, Intuitively zk-SNARKs in plain language — completeness, soundness, zero-knowledge — and what a proof actually proves about a shielded Zcash transaction. 10 min
- 6 Inside Zcash — Addresses, Notes, and Nullifiers How Zcash works under the hood — transparent vs shielded addresses, notes, commitments, nullifiers, and the Sapling/Orchard shielded pools. 13 min
- 7 Making a Truly Anonymous Transaction How to send Zcash with full privacy (z→z), the mistakes that de-anonymize you, viewing keys, and the honest trade-offs you should know. 12 min
- 8 Final Exam: The Privacy Gauntlet A graded, locked capstone exam — 26 one-shot questions covering every Zcash lesson, from why Bitcoin leaks to zero-knowledge proofs, nullifiers, and staying anonymous in practice. 16 min
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