Privacy Coins Overview

Privacy coins are cryptocurrencies built to obscure transaction details by default or on demand. Unlike Bitcoin or Ethereum, where amounts and addresses are visible, privacy coins aim to hide sender, receiver, and value — while still proving the ledger remains valid and supply is conserved.

Monero, Zcash, and smaller projects like Firo each combine different cryptographic techniques — ring signatures, zk-SNARKs, confidential transactions — to achieve their privacy goals. The engineering details matter for security audits, but the high-level split is default vs opt-in privacy.

Privacy coins face intense regulatory scrutiny. Several jurisdictions restrict or delist them from exchanges. Studying their designs teaches how strong on-chain privacy works — and why compliant systems often pursue hybrid models instead of full anonymity.