Privacy Token
What Is a Privacy Token?
While standard blockchains like Bitcoin and Ethereum are transparent—meaning anyone can view the entire transaction history of any wallet address—privacy tokens (often called privacy coins) are built to keep this data hidden.
Much like you wouldn’t want your bank statement published online, privacy token users believe their crypto transactions should be private. Through that lens, privacy tokens can function as a form of digital cash, allowing you to complete transactions while empowering you to keep your financial activity confidential. Examples include the privacy-focused cryptocurrencies Monero and Zcash.
How Do Privacy Tokens Work?
While every privacy token primarily aims to break the traceable link between sender and recipient, they use different cryptographic innovations to achieve this anonymity:
Stealth Addresses
Some networks like Monero (XMR) automatically create a unique, one-time address for every single transaction. This means that even if you receive multiple payments to the same “public” address, an outside observer cannot link them to your wallet.
Ring Signatures
Also used by Monero, this technique mixes your digital signature with a group of other users’ signatures. It proves that someone in the group authorized the transaction, but it’s computationally impossible to tell which specific person it was.
Zero-Knowledge Proofs (zk-SNARKs)Used by Zcash (ZEC), zk-SNARKs allow a user to prove a transaction is valid (i.e., they possess the funds) without revealing any details about the transaction itself.